AUDI A3 2008 – Body electrical (Canada, Mexico, USA) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2008 - Intermittent wiper switch - Cruise control system switch - Steering column electronics control unit

E22	Intermittent wiper switch
E45	Cruise control system switch
J527	Steering column electronics control unit
T8ae	8-pin connector
T10ad	10-pin connector
*	Only models with cruise control system (CCS)

Wiring Diagram AUDI A3 2008 - Turn signal switch - Steering angle sender - Horn plate - Steering column electronics control unit

E2	Turn signal switch
G85	Steering angle sender
H	Horn plate
J527	Steering column electronics control unit
T10ad	10-pin connector
T10ae	10-pin connector

Wiring Diagram AUDI A3 2008 - Ignition/starter switch - Steering column electronics control unit

D	Ignition/starter switch
J527	Steering column electronics control unit
N376	Ignition key withdrawal lock solenoid
SB2	Fuse 2 on fuse holder B
SB16	Fuse 16 on fuse holder B
T12z	12-pin connector
T20b	20-pin connector
T40	40-pin connector
369	Earth connection 4, in main wiring harness
*	E-box low
*2	E-box high

Wiring Diagram AUDI A3 2008 - Steering column electronics control unit - Data bus diagnostic interface

J527	Steering column electronics control unit
J533	Data bus diagnostic interface
J587	Selector lever sensors control unit
J623	Engine control unit
J743	Mechatronic unit for dual clutch gearbox
SB12	Fuse 12 on fuse holder B
SB24	Fuse 24 on fuse holder B
T16	16-pin connector
T20b	20-pin connector
T20d	20-pin connector
T40	40-pin connector
369	Earth connection 4, in main wiring harness
B444	Connection 1 (diagnosis), in main wiring harness
*	see applicable current flow diagram for automatic gearbox
*2	see applicable current flow diagram for engine
*3	Only models with cruise control system (CCS)
*4	Diagnostic connection
*5	E-box low
*6	E-box high

Wiring Diagram AUDI A3 2008 - Steering column electronics control unit - Data bus diagnostic interface

J527	Steering column electronics control unit
J533	Data bus diagnostic interface
J623	Engine control unit
J743	Mechatronic unit for dual clutch gearbox
T6	6-pin connector, near front left longitudinal member
T20b	20-pin connector
T20d	20-pin connector
369	Earth connection 4, in main wiring harness
B383	Connection 1 (powertrain CAN bus, high), in main wiring harness
B390	Connection 1 (powertrain CAN bus, low), in main wiring harness
B415	Connection 1 (infotainment CAN bus, high), in main wiring harness
B421	Connection 1 (infotainment CAN bus, low), in main wiring harness
*	see applicable current flow diagram for engine
*2	see applicable current flow diagram for automatic gearbox

Wiring Diagram AUDI A3 2008 - Onboard supply control unit - Steering column electronics control unit - Data bus diagnostic interface

J393	Convenience system central control unit
J519	Onboard supply control unit
J527	Steering column electronics control unit
J533	Data bus diagnostic interface
J623	Engine control unit
T12e	12-pin connector
T18	18-pin connector
T20b	20-pin connector
T20d	20-pin connector
369	Earth connection 4, in main wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
B475	Connection 11, in main wiring harness
*	see applicable current flow diagram for engine
*2	Only models with engine code CBFA
*3	Not for models with engine code CBFA

Wiring Diagram AUDI A3 2008 - Driver side central locking lock unit - Rear left central locking lock unit - Driver door control unit - Rear left door control unit - Onboard supply control unit

F2	Driver door contact switch
F10	Rear left door contact switch
F220	Driver side central locking lock unit
F222	Rear left central locking lock unit
J386	Driver door control unit
J388	Rear left door control unit
J519	Onboard supply control unit
K133	Central locking deadlock function warning lamp -SAFE-
T8d	8-pin connector, behind centre console
T20	20-pin connector, on left A-pillar
T20f	20-pin connector
T20l	20-pin connector, on left B-pillar
T20n	20-pin connector
369	Earth connection 4, in main wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	see applicable current flow diagram for convenience system
*2	Up to April 2007

Wiring Diagram AUDI A3 2008 - Front passenger side central locking lock unit - Rear right central locking lock unit - Front passenger door control unit - Rear right door control unit - Onboard supply control unit

F3	Front passenger door contact switch
F11	Rear right door contact switch
F221	Front passenger side central locking lock unit
F223	Rear right central locking lock unit
J387	Front passenger door control unit
J389	Rear right door control unit
J519	Onboard supply control unit
T20a	20-pin connector, on right A-pillar
T20g	20-pin connector
T20m	20-pin connector, on right B-pillar
T20o	20-pin connector
369	Earth connection 4, in main wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	see applicable current flow diagram for convenience system
*2	Up to April 2007

Wiring Diagram AUDI A3 2008 - Driver side central locking lock unit - Rear left central locking lock unit - Driver door control unit - Rear left door control unit - Onboard supply control unit

F2	Driver door contact switch
F10	Rear left door contact switch
F220	Driver side central locking lock unit
F222	Rear left central locking lock unit
J386	Driver door control unit
J388	Rear left door control unit
J519	Onboard supply control unit
K133	Central locking deadlock function warning lamp -SAFE-
T8d	8-pin connector, behind centre console
T20	20-pin connector, on left A-pillar
T20f	20-pin connector
T20l	20-pin connector, on left B-pillar
T20n	20-pin connector
369	Earth connection 4, in main wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	From May 2007
*2	see applicable current flow diagram for convenience system

Wiring Diagram AUDI A3 2008 - Front passenger side central locking lock unit - Rear right central locking lock unit - Front passenger door control unit - Rear right door control unit - Onboard supply control unit

F3	Front passenger door contact switch
F11	Rear right door contact switch
F221	Front passenger side central locking lock unit
F223	Rear right central locking lock unit
J387	Front passenger door control unit
J389	Rear right door control unit
J519	Onboard supply control unit
T20a	20-pin connector, on right A-pillar
T20g	20-pin connector
T20m	20-pin connector, on right B-pillar
T20o	20-pin connector
369	Earth connection 4, in main wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	From May 2007
*2	see applicable current flow diagram for convenience system

Wiring Diagram AUDI A3 2008 - Hazard warning lights button - Onboard supply control unit - Cigarette lighter - 12 V socket

E229	Hazard warning lights button
J519	Onboard supply control unit
K6	Indicator lamp for hazard warning light
L15	Ashtray illumination bulb
L28	Cigarette lighter illumination bulb
L42	Socket illumination bulb
T12e	12-pin connector
U1	Cigarette lighter
U5	12 V socket
369	Earth connection 4, in main wiring harness

Wiring Diagram AUDI A3 2008 - Parking brake contact switch - Onboard supply control unit - Tank filler flap locking motor

F321	Parking brake contact switch
J393	Convenience system central control unit
J519	Onboard supply control unit
SB25	Fuse 25 on fuse holder B
SB26	Fuse 26 on fuse holder B
SB47	Fuse 47 on fuse holder B
SB48	Fuse 48 on fuse holder B
T8g	8-pin connector
T11b	11-pin connector
T11c	11-pin connector
T18	18-pin connector
T40	40-pin connector
V155	Tank filler flap locking motor
369	Earth connection 4, in main wiring harness
*	E-box low
*2	E-box high

Wiring Diagram AUDI A3 2008 - Light switch - Front and rear fog light switch - Onboard supply control unit

E1	Light switch
E23	Front and rear fog light switch
J519	Onboard supply control unit
L120	Storage compartment illumination bulb
L121	Cup holder illumination bulb
T7	7-pin connector
T10e	10-pin connector
T12c	12-pin connector
T16a	16-pin connector
368	Earth connection 3, in main wiring harness
369	Earth connection 4, in main wiring harness
372	Earth connection 7, in main wiring harness
B278	Positive connection 2 (15a) in main wiring harness
B467	Connection 3, in main wiring harness
*	Only models with fog lights
*2	Only models with illuminated glove compartment and drink holder
*3	Only models with automatic driving lights control

Wiring Diagram AUDI A3 2008 - Light switch - Switch and instrument illumination regulator - Onboard supply control unit - Left fog light bulb - Right fog light bulb

E1	Light switch
E20	Switch and instrument illumination regulator
J519	Onboard supply control unit
L22	Left fog light bulb
L23	Right fog light bulb
T7	7-pin connector
T11b	11-pin connector
T11c	11-pin connector
T12e	12-pin connector
369	Earth connection 4, in main wiring harness
372	Earth connection 7, in main wiring harness
*	Only models with fog lights
*2	Only models with S line equipment

Wiring Diagram AUDI A3 2008 - Glove compartment light switch - Onboard supply control unit - Front roof module - Glove compartment light - Right footwell light - Rear interior light

E26	Glove compartment light switch
J519	Onboard supply control unit
T8a	8-pin connector, near glove compartment
T10d	10-pin connector
T12c	12-pin connector
W1	Front interior light
WX3	Front roof module
W6	Glove compartment light
W10	Right footwell light
W11	Rear left reading light
W12	Rear right reading light
W13	Front passenger reading light
W19	Driver side reading light
W43	Rear interior light
369	Earth connection 4, in main wiring harness
372	Earth connection 7, in main wiring harness
B466	Connection 2, in main wiring harness
*	see applicable current flow diagram for convenience system

Wiring Diagram AUDI A3 2008 - Headlight washer system relay - Onboard supply control unit - Headlight washer system pump

C	Alternator
J39	Headlight washer system relay
J519	Onboard supply control unit
T4	4-pin connector
T8h	8-pin connector
T11c	11-pin connector
V11	Headlight washer system pump
369	Earth connection 4, in main wiring harness
372	Earth connection 7, in main wiring harness
*	Only models with headlight washer system
*2	Only models with air conditioning system
*3	Only models with battery in engine compartment
*4	Only models with battery in luggage compartment
*5	see applicable current flow diagram
*6	see applicable current flow diagram for engine

Wiring Diagram AUDI A3 2008 - Steering moment sender - Power steering control unit - Onboard supply control unit

G269	Steering moment sender
J500	Power steering control unit
J519	Onboard supply control unit
SA2	Fuse 2 in fuse holder A
T2a	2-pin connector
T5	5-pin connector
T5a	5-pin connector
T6	6-pin connector, near front left longitudinal member
369	Earth connection 4, in main wiring harness
372	Earth connection 7, in main wiring harness
B277	Positive connection 1 (15a) in main wiring harness
*	Only models with battery in engine compartment
*2	Only models with battery in luggage compartment
*3	see applicable current flow diagram

Wiring Diagram AUDI A3 2008 - Brake light switch - Brake pedal switch - Clutch position sender - Onboard supply control unit

F	Brake light switch
F63	Brake pedal switch
G476	Clutch position sender
J519	Onboard supply control unit
J623	Engine control unit
J743	Mechatronic unit for dual clutch gearbox
SB22	Fuse 22 on fuse holder B
SB39	Fuse 39 on fuse holder B
T16a	16-pin connector
T40	40-pin connector
369	Earth connection 4, in main wiring harness
372	Earth connection 7, in main wiring harness
B277	Positive connection 1 (15a) in main wiring harness
B335	Connection 1 (54), in main wiring harness
*	Only models with manual gearbox
*2	see applicable current flow diagram for engine
*3	see applicable current flow diagram for automatic gearbox
*4	Only models with automatic gearbox
*5	E-box low
*6	E-box high
*7	Only models with engine code CBFA

Wiring Diagram AUDI A3 2008 - Reversing light switch - Front left brake pad wear sender - Rain and light sensor - Onboard supply control unit - Left washer jet heater element - Right washer jet heater element

F4	Reversing light switch
G34	Front left brake pad wear sender
G397	Rain and light sensor
J519	Onboard supply control unit
T8h	8-pin connector
Z20	Left washer jet heater element
Z21	Right washer jet heater element
369	Earth connection 4, in main wiring harness
372	Earth connection 7, in main wiring harness
B281	Positive connection 5 (15a) in main wiring harness
B549	Connection 2 (LIN bus) in main wiring harness
*	Only models with automatic driving lights control
*2	Only models with manual gearbox
*3	Only models with heater elements for washer jets

Wiring Diagram AUDI A3 2008 - Oil level and oil temperature sender - Wiper motor control unit - Onboard supply control unit - Windscreen wiper motor

G266	Oil level and oil temperature sender
J400	Wiper motor control unit
J519	Onboard supply control unit
SB19	Fuse 19 on fuse holder B
SB31	Fuse 31 on fuse holder B
T6	6-pin connector, near front left longitudinal member
T8h	8-pin connector
T40	40-pin connector
V	Windscreen wiper motor
366	Earth connection 1, in main wiring harness
369	Earth connection 4, in main wiring harness
B281	Positive connection 5 (15a) in main wiring harness
B549	Connection 2 (LIN bus) in main wiring harness
*	Only models with extended servicing intervals (ESI)
*2	E-box low
*3	E-box high

Wiring Diagram AUDI A3 2008 - Onboard supply control unit - Left side light bulb - Front left turn signal bulb - Left turn signal repeater bulb - Left headlight dipped beam bulb - Left headlight main beam bulb

J519	Onboard supply control unit
M1	Left side light bulb
M5	Front left turn signal bulb
M18	Left turn signal repeater bulb
M29	Left headlight dipped beam bulb
M30	Left headlight main beam bulb
T11b	11-pin connector
T11c	11-pin connector
366	Earth connection 1, in main wiring harness
369	Earth connection 4, in main wiring harness

Wiring Diagram AUDI A3 2008 - Bonnet contact switch - Treble horn - Bass horn - Horn relay - Onboard supply control unit

F266	Bonnet contact switch
H2	Treble horn
H7	Bass horn
J413	Horn relay
J519	Onboard supply control unit
SB5	Fuse 5 on fuse holder B
SB17	Fuse 17 on fuse holder B
T6h	6-pin connector
T8h	8-pin connector
T40	40-pin connector
366	Earth connection 1, in main wiring harness
367	Earth connection 2, in main wiring harness
369	Earth connection 4, in main wiring harness
*	E-box low
*2	E-box high

Wiring Diagram AUDI A3 2008 - Onboard supply control unit - Right side light bulb - Front right turn signal bulb - Right turn signal repeater bulb - Right headlight dipped beam bulb - Right headlight main beam bulb

J519	Onboard supply control unit
M3	Right side light bulb
M7	Front right turn signal bulb
M19	Right turn signal repeater bulb
M31	Right headlight dipped beam bulb
M32	Right headlight main beam bulb
T11b	11-pin connector
T11c	11-pin connector
366	Earth connection 1, in main wiring harness
367	Earth connection 2, in main wiring harness
369	Earth connection 4, in main wiring harness

Wiring Diagram AUDI A3 2008 - Window aerial suppression filter - Heated rear window relay - Onboard supply control unit - Left aerial module - Heated rear window - Heated rear window with window aerial

C18	Window aerial suppression filter
J9	Heated rear window relay
J519	Onboard supply control unit
R108	Left aerial module
T6a	6-pin connector, on left C-pillar
T10d	10-pin connector
Z1	Heated rear window
Z24	Heated rear window with window aerial
218	Earth connection 1, in rear lid wiring harness
366	Earth connection 1, in main wiring harness
369	Earth connection 4, in main wiring harness
Q22	Connection 1, in rear lid wiring harness
Q44	Connection 2, in rear lid wiring harness

Wiring Diagram AUDI A3 2008 - Onboard supply control unit - Terminal 30 voltage supply relay 2

J519	Onboard supply control unit
J689	Terminal 30 voltage supply relay 2
SD1	Fuse 1 on fuse holder D
SB3	Fuse 3 on fuse holder B
SB4	Fuse 4 on fuse holder B
SC15	Fuse 15 on fuse holder C
T8h	8-pin connector
T10d	10-pin connector
T40	40-pin connector
366	Earth connection 1, in main wiring harness
369	Earth connection 4, in main wiring harness
B272	Positive connection (30), in main wiring harness
B302	Positive connection 6 (30), in main wiring harness
*	Only models with battery in engine compartment
*2	Only models with battery in luggage compartment
*3	E-box low
*4	E-box high
*5	Only models with interior light
*6	see applicable current flow diagram for battery in engine compartment
*7	see applicable current flow diagram

Wiring Diagram AUDI A3 2008 - Onboard supply control unit

J519	Onboard supply control unit
SC16	Fuse 16 on fuse holder C
SC24	Fuse 24 on fuse holder C
SC25	Fuse 25 on fuse holder C
SC26	Fuse 26 on fuse holder C
T10d	10-pin connector
366	Earth connection 1, in main wiring harness
369	Earth connection 4, in main wiring harness
B272	Positive connection (30), in main wiring harness
B315	Positive connection 1 (30a) in main wiring harness

Wiring Diagram AUDI A3 2008 - Onboard supply control unit - Terminal 15 voltage supply relay 2 - Terminal 50 voltage supply relay

B	Starter
J519	Onboard supply control unit
J623	Engine control unit
J681	Terminal 15 voltage supply relay 2
J682	Terminal 50 voltage supply relay
SC1	Fuse 1 on fuse holder C
SC2	Fuse 2 on fuse holder C
SC4	Fuse 4 on fuse holder C
SB28	Fuse 28 on fuse holder B
SB49	Fuse 49 on fuse holder B
T1	Single connector
T2t	2-pin connector
T8h	8-pin connector
T11b	11-pin connector
T40	40-pin connector
366	Earth connection 1, in main wiring harness
369	Earth connection 4, in main wiring harness
B273	Positive connection (15), in main wiring harness
B276	Positive connection (50), in main wiring harness
*	see applicable current flow diagram for engine
*2	E-box high
*3	E-box low
*4	Only models with engine code CBFA

Wiring Diagram AUDI A3 2008 - X-contact relief relay - Onboard supply control unit

J59	X-contact relief relay
J519	Onboard supply control unit
SB29	Fuse 29 on fuse holder B
SB30	Fuse 30 on fuse holder B
SC32	Fuse 32 on fuse holder C
SC41	Fuse 41 on fuse holder C
SC42	Fuse 42 on fuse holder C
SB52	Fuse 52 on fuse holder B
SB53	Fuse 53 on fuse holder B
T2b	2-pin connector
T6h	6-pin connector
T40	40-pin connector
369	Earth connection 4, in main wiring harness
B300	Positive connection 4 (30), in main wiring harness
*	E-box high
*2	E-box low

Wiring Diagram AUDI A3 2008 - Rear lid handle release button - Rear lid contact switch for anti-theft alarm - Onboard supply control unit - Rear lid central locking motor - Number plate light

E234	Rear lid handle release button
F123	Rear lid contact switch for anti-theft alarm
J393	Convenience system central control unit
J519	Onboard supply control unit
T6a	6-pin connector, on left C-pillar
T8b	8-pin connector, on left C-pillar
T8g	8-pin connector
T12d	12-pin connector
T18	18-pin connector
V53	Rear lid central locking motor
X	Number plate light
98	Earth connection, in rear lid wiring harness
369	Earth connection 4, in main wiring harness

Wiring Diagram AUDI A3 2008 - Onboard supply control unit - Rear window wiper motor - Windscreen and rear window washer pump

J519	Onboard supply control unit
J729	Double washer pump relay 1
J730	Double washer pump relay 2
T6h	6-pin connector
T8b	8-pin connector, on left C-pillar
V12	Rear window wiper motor
V59	Windscreen and rear window washer pump
98	Earth connection, in rear lid wiring harness
369	Earth connection 4, in main wiring harness
B183	Connection 1 (washer pump), in interior wiring harness
B465	Connection 1, in main wiring harness

Wiring Diagram AUDI A3 2008 - Onboard supply control unit - Rear left turn signal bulb - Left reversing light bulb - Left brake and tail light bulb - Additional brake light bulb

J519	Onboard supply control unit
M6	Rear left turn signal bulb
M16	Left reversing light bulb
M21	Left brake and tail light bulb
M25	Additional brake light bulb
T2aw	2-pin connector, in rear lid
T6a	6-pin connector, on left C-pillar
T8b	8-pin connector, on left C-pillar
T12c	12-pin connector
T12d	12-pin connector
98	Earth connection, in rear lid wiring harness
369	Earth connection 4, in main wiring harness
371	Earth connection 6, in main wiring harness
*	Only models with S line equipment

Wiring Diagram AUDI A3 2008 - Onboard supply control unit - Rear right turn signal bulb - Right reversing light bulb - Right brake and tail light bulb - Electric socket

J519	Onboard supply control unit
M8	Rear right turn signal bulb
M17	Right reversing light bulb
M22	Right brake and tail light bulb
T6a	6-pin connector, on left C-pillar
T8b	8-pin connector, on left C-pillar
T12c	12-pin connector
T12d	12-pin connector
U	Electric socket
98	Earth connection, in rear lid wiring harness
369	Earth connection 4, in main wiring harness
370	Earth connection 5, in main wiring harness
371	Earth connection 6, in main wiring harness
B182	Connection (RL), in interior wiring harness

Wiring Diagram AUDI A3 2008 - Immobiliser reader coil - Control unit in dash panel insert - Radio controlled clock receiver - Luggage compartment light

D2	Immobiliser reader coil
J285	Control unit in dash panel insert
J393	Convenience system central control unit
J489	Radio controlled clock receiver
K4	Side light warning lamp
SB6	Fuse 6 on fuse holder B
SB17	Fuse 17 on fuse holder B
T18	18-pin connector
T32	32-pin connector
T40	40-pin connector
W3	Luggage compartment light
Y8	Radio controlled clock
369	Earth connection 4, in main wiring harness
371	Earth connection 6, in main wiring harness
B299	Positive connection 3 (30), in main wiring harness
*	E-box low
*2	E-box high

Wiring Diagram AUDI A3 2008 - Brake fluid level warning contact - Coolant shortage indicator switch - Fuel gauge sender 2 - Control unit in dash panel insert

F34	Brake fluid level warning contact
F66	Coolant shortage indicator switch
G1	Fuel gauge
G169	Fuel gauge sender 2
J285	Control unit in dash panel insert
J587	Selector lever sensors control unit
K14	Handbrake warning lamp
K16	Reserve fuel warning lamp
K28	Coolant temperature and coolant shortage warning lamp
K32	Brake pad warning lamp
K65	Left turn signal warning lamp
K94	Right turn signal warning lamp
K118	Brake system warning lamp
T32	32-pin connector
401	Earth connection (sender earth), in interior wiring harness
B340	Connection 1 (58d), in main wiring harness
*	see applicable current flow diagram for automatic gearbox
*2	Only models with all-wheel drive

Wiring Diagram AUDI A3 2008 - Ambient temperature sensor - Windscreen washer fluid level sender - Control unit in dash panel insert

F1	Oil pressure switch
G17	Ambient temperature sensor
G33	Windscreen washer fluid level sender
G106	Ambient temperature indicator
H3	Buzzer and gong
J285	Control unit in dash panel insert
K1	Main beam warning lamp
K2	Alternator warning lamp
K3	Oil pressure warning lamp
K102	Rear lid closed warning lamp,
T14	14-pin connector
T32	32-pin connector
283	Earth point 2, engine prewiring harness
401	Earth connection (sender earth), in interior wiring harness
*	Only models with windscreen washer fluid level sender and water level sender
*2	see applicable current flow diagram for engine

AUDI A3 2008 Overview of control units

Overview of control units

q	Connector assignment

q	Connector assignment

q	not for models with US equipment

2 -

q	Connector assignment

q	Connector assignment

q	not for models with US equipment

q	Connector assignment

q	for models with 5-door models only

q	Connector assignment

q	Connector assignment

q	Connector assignment

q	for models with 5-door models only

q	Connector assignment

q	not for models with US equipment

q	Connector assignment

q	not for models with US equipment

q	Connector assignment

q	Connector assignment

q	Location, from model year 2010

q	Connector assignment, from model year 2004

q	Connector assignment, from model year 2010

Heater control unit -J162-

q

Location

13 -

q	Connector assignment

13 -

14 -

Auxiliary air heater control unit -J604-

q

Location

q	Connector assignment

q	not for models with US equipment

q	Connector assignment

16 -

q	Connector assignment

16 -

16 -

q	Connector assignment

q	Connector assignment

q	Connector assignment, 75 pin

q	Connector assignment, 84 pin

q	Connector assignment, 100 pin

Control unit with display for radio and navigation system -J503-

q

Location

20 -

Anti-theft and tilt system control unit -J529-

Location: Behind the glove compartment-2-

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AUDI A3 2008 Headlight range control, control unit J431 Headlight range control, control unit -J431- Location: Below the dash panel on right, on left centre console -arrow-

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Connector assignment.

A -	Headlight range control, control unit -J431-

Connector:

B -	26-pin connector -T26a-

AUDI A3 2008 Front passenger seat heating control unit J727 Front passenger seat heating control unit -J727-

Location: Under front passenger seat

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Connector assignment.

-	Front passenger seat heating control unit -J727-

Connector:

A -	6-pin connector -T6p-

AUDI A3 2008 Sliding sunroof adjustment control unit J245 Sliding sunroof adjustment control unit -J245-

Location: Under cover for interior light operating unit -arrow-

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Connector assignment.

-	Sliding sunroof adjustment control unit -J245-

Connector:

A -	6-pin connector -T6b-

B -	6-pin connector -T6t-

AUDI A3 2008 NOx sensor control unit J583 NOx sensor control unit -J583- Location: on underbody, near NOx catalytic converter

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AUDI A3 2008 Rear left door control unit J388 / Rear right door control unit J389 Rear left door control unit -J388-/Rear right door control unit -J389- Location: in rear door

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Connector assignment.

A -	Rear left door control unit -J388-

Connector:

B -	32-pin connector -T32e-

C -	16-pin connector(Vacant)

D -	20-pin connector -T20n-

Connector assignment.

A -	Rear right door control unit -J389-

Connector:

B -	32-pin connector -T32f-

C -	16-pin connector(Vacant)

D -	20-pin connector -T20o-

AUDI A3 2008 Control unit in dash panel insert J285 Control unit in dash panel insert -J285-

Location: in dash panel

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Connector assignment.

-	Control unit in dash panel insert -J285-

Connector:

A -	32-pin connector -T32-

AUDI A3 2008 Fuel pump control unit J538 Fuel pump control unit -J538-

Location: under rear seat bench, on fuel pump -arrow-

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Connector assignment.

A -	Fuel pump control unit -J538-

Connector:

B -	10-pin connector -T10b-

AUDI A3 2008 Driver seat heating control unit J726 Driver seat heating control unit -J726-

Location: under driver seat

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Connector assignment.

-	Driver seat heating control unit -J726-

Connector:

A -	6-pin connector -T6o-

AUDI A3 2008 Steering column electronics control unit J527 Steering column electronics control unit -J527-

Location: On steering column -arrow-

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Connector assignment.

A -	Steering column electronics control unit -J527-

B -	4-pin connector(Airbag mounting)

C -	10-pin connector(Cruise control system and turn signal support)

D -	20-pin connector -T20b-

E -	4-pin connector -T4n-

F -	12-pin connector(Ignition/starter switch and ignition key withdrawal lock support)

G -	8-pin connector(Wiper support, interval potentiometer and multifunction system)

H -	10-pin connector(Steering angle sensor support)

I -	10-pin connector(Coil connector support)

AUDI A3 2008 Driver door control unit J386 Driver door control unit -J386-

Location: In driver door -arrow-

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Connector assignment.

A -	Driver door control unit -J386-

Connector:

B -	32-pin connector -T32a-

C -	16-pin connector -T16b-

D -	20-pin connector -T20f-

AUDI A3 2008 Onboard supply control unit J519 Onboard supply control unit -J519-

Location: On left under dash panel, under relay carrier -arrow-

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Connector assignment.

-	Onboard supply control unit -J519-

Connector:

A -	11-pin connector -T11b-

B -	12-pin connector -T12c-

C -	12-pin connector -T12d-

D -	11-pin connector -T11c-

E -	16-pin connector -T16a-

F -	8-pin connector -T8h-

G -	12-pin connector -T12e-

H -	12-pin connector

I -	2-pin connector -T2b-

J -	6-pin connector -T6h-

K -	10-pin connector -T10d-

L -	2-pin connector -T2t-

AUDI A3 2008 Onboard supply control unit J519 Onboard supply control unit -J519-

Location: Left under dash panel -arrow-

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Connector assignment.

-	Onboard supply control unit -J519-

Connector:

A -	52-pin connector -T52a-

B -	52-pin connector -T52b-

C -	52-pin connector -T52c-

AUDI A3 2008 Heater control unit J65 / Heater control unit J162 Heater control unit -J65-/Heater control unit -J162- Location: in centre console

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AUDI A3 2008 Climatronic control unit J255 Climatronic control unit -J255- Location: in centre console

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Connector assignment.

-	Climatronic control unit -J255-

Connector:

A -	12-pin connector -T12f-

B -	20-pin connector -T20j-

C -	16-pin connector -T16e-

D -	16-pin connector -T16d-

AUDI A3 2008 data bus diagnostic interface J533 data bus diagnostic interface -J533-

Location: in left footwell -arrow-   Note Location ofdata bus diagnostic interface -J533-is the same for right and left-hand drive models.

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Connector assignment.

A -	data bus diagnostic interface -J533-

Connector:

B -	20-pin connector -T20d-

AUDI A3 2008 Fresh air blower control unit J126 Fresh air blower control unit -J126- Location: Under glove compartment, onfresh air blower -V2-

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AUDI A3 2008 Front passenger door control unit J387 Front passenger door control unit -J387- Location: in front passenger door -arrow-

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Connector assignment.

A -	Front passenger door control unit -J387-

Connector:

B -	32-pin connector -T32b-

C -	16-pin connector -T16c-

D -	20-pin connector -T20g-

AUDI A3 2008 Airbag control unit J234 Airbag control unit -J234-

Location: Under centre console -arrow-

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Connector assignment.

A -	Airbag control unit -J234-

Connector:

B -	75-pin connector -T75-

Connector assignment.

-	Airbag control unit -J234-

Connector:

A -	84-pin connector -T84-

A -	84-pin connector -T84a-

Connector assignment.

-	Airbag control unit -J234-

Connector:

A -	100-pin connector -T100-

A -	100-pin connector -T100a-

AUDI A3 2008 Auxiliary air heater control unit J604 Auxiliary air heater control unit -J604-

Location: on air conditioning system unit, extreme left, next to heat exchanger

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Connector assignment.

-	Auxiliary air heater control unit -J604-

Connector:

A -	4-pin connector -T4l-

AUDI A3 2008 Radio R / Control unit with display for radio and navigation system J503 (RNS-low) Radio -R-/Control unit with display for radio and navigation system -J503- (RNS-low) Location: In centre console -arrow-

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AUDI A3 2008 Navigation operating electronics control unit J402 (RNS-E) Navigation operating electronics control unit -J402- (RNS-E) Location: in centre console

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AUDI A3 2008 CD changer R41 CD changer -R41- Location: In glove box -arrow-

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AUDI A3 2008 Electronically controlled damping control unit J250 Electronically controlled damping control unit -J250- Location: Under front passenger seat -arrow-

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Connector assignment.

-	Electronically controlled damping control unit -J250-

Connector:

A -	47-pin connector -T47-

AUDI A3 2008 Tyre pressure monitor control unit J502 Tyre pressure monitor control unit -J502-

Location: Behind the glove compartment -arrow-

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Connector assignment.

-	Tyre pressure monitor control unit -J502-

Connector:

A -	20-pin connector -T20q-

AUDI A3 2008 Connection for external audio source R199 Connection for external audio source -R199- Fitting location In glove compartment

A -	Connection for external audio source -R199-

B -	12-pin connector -T12y-

AUDI A3 2008 Voltage stabiliser J532 Voltage stabiliser -J532-

Location: Under driver seat -arrow-

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Connector assignment.  -  Voltage stabiliser -J532- Connector: A -  12-pin connector -T12x-

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AUDI A3 2008 Overview of fuses

Overview of fuses

q	Position of fuses on main fuse holder, electronics box low, from model year 2006

q	Position of fuses on main fuse holder, electronics box low, from model year 2007

q	Location on main fuse holder, electronics box low, from November 2008

q	Position of fuses on main fuse holder, electronics box low, from November 2008

q	Location main fuse holder, electronics box high

q	Position of fuses on main fuse holder, electronics box high, from model year 2004

q	Position of fuses on main fuse holder, electronics box high, from model year 2005

q	Position of fuses on main fuse holder, electronics box high, from model year 2006

q	Position​ of​ fuses,​ electronics​ box​ low,​ from​ model​ year​ 2006

q	Position​ of​ fuses,​ electronics​ box​ low,​ from​ model​ year​ 2007

q	Fitting location of E-box high

q	Position of fuses, electronics box high, from model year 2004

q	Position of fuses, electronics box high, from model year 2006

q	Position of fuses, electronics box high, from model year 2007

q	Position of fuses, from model year 2004

q	Position of fuses, from model year 2006

q	Position of fuses, from model year 2007

q	Position of fuses on main fuse box, from model year 2004

q	Position of fuses on main fuse box, from model year 2006

5 -

Main fuse holder: Location fuse holder A -SA- on electronics box low, from model year 2006

Main Supply Connection:

M -	Screw connection M (terminal 30)

AUDI A3 2008 Position of fuses electronics box low, from model year 2006

Position of fuses electronics box low, from model year 2006

Current Flow Diagram designation			Nominal value		Function/component	Terminal
Fuse 1 on fuse holder A -SA1-			150 A	-	Alternator -C- (70 A) Alternator -C- (90 A) Alternator -C- (110 A) Alternator -C- (120 A)	30
			200 A	-	Alternator -C- (140 A)	30
Fuse 2 on fuse holder A -SA2-			80 A	-	Power steering control unit -J500-	30
Fuse 3 on fuse holder A -SA3-			50 A	-	Radiator fan control unit -J293- Radiator​ fan​ thermal​ switch -F18- Radiator fan -V7-	30
Fuse 4 on fuse holder A -SA4-			80 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC19-, -SC22- up to -SC27-, -SC28-, -SC38- is dropped from November 2005	30
Fuse 5 on fuse holder A -SA5-			80 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC19-, -SC22- up to -SC27-, -SC28-, -SC38- applicable from November 2005	30
Fuse 5 on fuse holder A -SA5-			100 A	-	Auxiliary air heater control unit -J604- is dropped from November 2005	30
Fuse 6 on fuse holder A -SA6-			100 A	-	Auxiliary air heater control unit -J604- applicable from November 2005	30
Fuse 7 on fuse holder A -SA7-			50 A	-	Option doctor	30
			80 A	-	Option police	30

AUDI A3 2008 Position of fuses electronics box low, from model year 2007

Position of fuses electronics box low, from model year 2007

Current Flow Diagram designation			Nominal value		Function/component	Terminal
Fuse 1 on fuse holder A -SA1-			150 A	-	Alternator -C- (70 A) Alternator -C- (90 A) Alternator -C- (110 A) Alternator -C- (120 A)	30
			200 A	-	Alternator -C- (140 A)	30
Fuse 2 on fuse holder A -SA2-			80 A	-	Power steering control unit -J500-	30
Fuse 3 on fuse holder A -SA3-			50 A	-	Radiator fan control unit -J293- Radiator​ fan​ thermal​ switch -F18- Radiator fan -V7-	30
Fuse 4 on fuse holder A -SA4-			40 A	-	Low heat output relay -J359- applicable from November 2006	30
Fuse 5 on fuse holder A -SA5-			80 A	-	B272 Positive connection (30), in main wiring harness Supply for the fuses: -SC12- up to -SC17-, -SC22- up to -SC27-, -SC28-, -SC38-, -SC43-	30
Fuse 6 on fuse holder A -SA6-			100 A	-	Auxiliary air heater control unit -J604- is dropped from November 2006	30
Fuse 6 on fuse holder A -SA6-			80 A	-	High heat output relay -J360- applicable from November 2006	30
Fuse 7 on fuse holder A -SA7-			50 A	-	Option doctor	30
			80 A	-	Option police	30
			30 A	-	Electronically controlled damping control unit -J 250- applicable from May 2008	30

AUDI A3 2008 Main fuse holder: Location fuse holder A SA on electronics box low, from November 2008

Main fuse holder: Location fuse holder A -SA- on electronics box low, from November 2008

Main Supply Connection:

M -	Screw connection M (terminal 30)

AUDI A3 2008 Position of fuses in electronics box low, from November 2008

Position of fuses in electronics box low, from November 2008

Current Flow Diagram designation			Nominal value		Function/component	Terminal
Fuse 1 on fuse holder A -SA1-			150 A	-	Alternator -C- (70 A) Alternator -C- (90 A) Alternator -C- (110 A) Alternator -C- (120 A)	30
			200 A	-	Alternator -C- (140 A)	30
Fuse 2 on fuse holder A -SA2-			80 A	-	Power steering control unit -J500-	30
Fuse 3 on fuse holder A -SA3-			50 A	-	Radiator fan control unit -J293- Radiator​ fan​ thermal​ switch -F18- Radiator fan -V7-	30
Fuse 4 on fuse holder A -SA4-			80 A	-	High heat output relay -J360-	30
Fuse 5 on fuse holder A -SA5-			80 A	-	B272 Positive connection (30), in main wiring harness Supply for the fuses: -SC12- up to -SC17-, -SC22- up to -SC27-, -SC28-, -SC38-, -SC43-	30
Fuse 6 on fuse holder A -SA6-			40 A	-	Low heat output relay -J359-	30
Fuse 7 on fuse holder A -SA7-			50 A	-	Option doctor is dropped from May 2009	30
			50 A	-	Option doctor or police applicable from May 2009	30
			80 A	-	Option police is dropped from May 2009	30
			30 A	-	Electronically controlled damping control unit -J 250-	30

AUDI A3 2008 Main fuse holder: Location fuse holder A SA on electronics box high

Main fuse holder: Location fuse holder A -SA- on electronics box high

Main Supply Connection:

1 -	Screw connection A (terminal 30)

2 -	Screw connection M (terminal 30)

3 -	Screw connection L (terminal 30)

AUDI A3 2008 Position of fuses electronics box high, from model year 2004

Position of fuses electronics box high, from model year 2004

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
4	-	Fuse 1 on fuse holder A -SA1-	150 A	-	Alternator -C- (70 A) Alternator -C- (90 A) Alternator -C- (110 A) Alternator -C- (120 A)	30
4	-	Fuse 1 on fuse holder A -SA1-	200 A	-	Alternator -C- (140 A)	30
5	-	Fuse 2 on fuse holder A -SA2-	80 A	-	Power steering control unit -J500-	30
6	-	Fuse 3 on fuse holder A -SA3-	80 A	-	Radiator fan control unit -J293-	30
7	-	Fuse 4 on fuse holder A -SA4-	80 A	-	Window regulator single fuse -S37- Supply for the fuses: -SC22- up to -SC27- for models with battery in luggage compartment only	30
8	-	Fuse 5 on fuse holder A -SA5-	100 A	-	Auxiliary air heater control unit -J604-	30
9	-	Fuse 6 on fuse holder A -SA6-	50 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC44-, -SC45- for models with battery in luggage compartment only	30
			80 A	-	Window regulator single fuse -S37- Supply for the fuses: -SC12- up to -SC17-, -SC22- up to -SC27- for models with battery in engine compartment only	30

AUDI A3 2008 Position of fuses electronics box high, from model year 2005

Position of fuses electronics box high, from model year 2005

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
4	-	Fuse 1 on fuse holder A -SA1-	150 A	-	Alternator -C- (70 A) Alternator -C- (90 A) Alternator -C- (110 A) Alternator -C- (120 A)	30
4	-	Fuse 1 on fuse holder A -SA1-	200 A	-	Alternator -C- (140 A)	30
5	-	Fuse 2 on fuse holder A -SA2-	80 A	-	Power steering control unit -J500-	30
6	-	Fuse 3 on fuse holder A -SA3-	80 A	-	Radiator fan control unit -J293-	30
7	-	Fuse 4 on fuse holder A -SA4-	80 A	-	Window regulator single fuse -S37- Window regulator single fuse 2 -S280- Supply for the fuses: -SC22- up to -SC27- for models with battery in luggage compartment only	30
8	-	Fuse 5 on fuse holder A -SA5-	100 A	-	Auxiliary air heater control unit -J604-	30
9	-	Fuse 6 on fuse holder A -SA6-	50 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC19-, -SC44-, -SC45- for models with battery in luggage compartment only	30
			80 A	-	Window regulator single fuse -S37- Window regulator single fuse 2 -S280- Supply for the fuses: -SC12- up to -SC17-, -SC19-, -SC22- up to -SC27- for models with battery in engine compartment only	30

AUDI A3 2008 Position of fuses electronics box high, engine codes AXX, BWA, BPY, BHZ, BZC, CDLA, CDLC, from model year 2006

Position of fuses electronics box high, engine codes AXX, BWA, BPY, BHZ, BZC, CDLA, CDLC, from model year 2006

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
4	-	Fuse 1 on fuse holder A -SA1-	150 A	-	Alternator -C- (70 A) Alternator -C- (90 A) Alternator -C- (110 A) Alternator -C- (120 A)	30
			200 A	-	Alternator -C- (140 A)
5	-	Fuse 2 on fuse holder A -SA2-	80 A	-	Power steering control unit -J500-	30
6	-	Fuse 3 on fuse holder A -SA3-	50 A	-	Radiator fan control unit -J293-	30
7	-	Fuse 4 on fuse holder A -SA4-	80 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC19-, -SC22- up to -SC27-, -SC28-, -SC38- is dropped from November 2005	30
7	-	Fuse 4 on fuse holder A -SA4-	80 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC22- up to -SC27-, -SC28-, -SC38-, -SC43- applicable from May 2009	30
8	-	Fuse 5 on fuse holder A -SA5-	80 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC19-, -SC22- up to -SC27-, -SC28-, -SC38- applicable from November 2005 is dropped from May 2006	30
8	-	Fuse 5 on fuse holder A -SA5-	80 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC22- up to -SC27-, -SC28-, -SC38-, -SC43- applicable from May 2006 is dropped from May 2009	30
9	-	Fuse 6 on fuse holder A -SA6-	-	-	Not assigned	-
10	-	Fuse 7 on fuse holder A -SA7-	50 A	-	Option doctor is dropped from May 2009	30
			50 A		Option doctor or police applicable from May 2009
			80 A		Option police is dropped from May 2009
			30 A		Electronically controlled damping control unit -J 250- applicable from May 2008

AUDI A3 2008 Position of fuses electronics box high, engine codes BMJ, BUB, CBRA, from model year 2006, CEPA, CEPB from model year 2011

Location fuse holder B -SB- on electronics box low, in left of engine compartment

Fuse colours

50A - red

40A - orange

30A - light-green

25A - natural (white)

20 A - yellow

15A - light blue

10A - red

7.5A - brown

5A - light-brown

3 A - purple

AUDI A3 2008 Position of fuses electronics box low, from model year 2006

Position of fuses electronics box low, from model year 2006

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
F1	-	Fuse 1 on fuse holder B -SB1-	20 A	-	Convenience system central control unit -J393-	30
F2	-	Fuse 2 on fuse holder B -SB2-	5 A	-	Steering column electronics control unit -J527-	30
F3	-	Fuse 3 on fuse holder B -SB3-	5 A	-	Onboard supply control unit -J519-	30
F4	-	Fuse 4 on fuse holder B -SB4-	30 A	-	ABS control unit -J104- ABS​ hydraulic​ unit -N55-	30
F5	-	Fuse 5 on fuse holder B -SB5-	15 A	-	Mechatronic unit for dual clutch gearbox -J743-	30
F6	-	Fuse 6 on fuse holder B -SB6-	5 A	-	Control unit in dash panel insert -J285-	30
F7	-	Not assigned	-	-
F8	-	Fuse 8 on fuse holder B -SB8-	15 A	-	Radio -R- Navigation operating electronics control unit -J402-	30
F9	-	Fuse 9 on fuse holder B -SB9-	5 A	-	Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401- Navigation system tuner for TV -J415- Satellite radio -R146- Telephone transmitter and receiver unit -R36- Aerial​ amplifier​ for​ mobile​ telephone -R86-	30
F10	-	Fuse 10 on fuse holder B -SB10-	5 A	-	Motronic control unit -J220- Motronic current supply relay -J271- Terminal 30 voltage supply relay -J317-	30
F11	-	Fuse 11 on fuse holder B -SB11-	20 A	-	Auxiliary heater control unit -J364-	30
F12	-	Fuse 12 on fuse holder B -SB12-	5 A	-	Data bus diagnostic interface -J533-	30
F13	-	Fuse 13 on fuse holder B -SB13-	30 A	-	Engine control unit -J623- Diesel direct injection system control unit -J248-	87
			25 A	-	Motronic control unit -J220- Engine control unit -J623-
F14	-	Fuse 14 on fuse holder B -SB14-	20 A	-	Ignition coil 1 with output stage -N- Ignition coil 2 -N128- Ignition coil 1 with output stage -N70- Ignition coil 2 with output stage -N127- Ignition coil 3 with output stage -N291- Ignition coil 4 with output stage -N292-	87
F15	-	Fuse 15 on fuse holder B -SB15-	15 A	-	Lambda probe 1 heater after catalytic converter -Z29- Lambda probe 2 heater after catalytic converter -Z30- Lambda probe 3 heater after catalytic converter -Z64-	87
F15	-	Fuse 15 on fuse holder B -SB15-	10 A	-	Lambda probe 1 heater after catalytic converter -Z29-	87
F15	-	Fuse 15 on fuse holder B -SB15-	5 A	-	Automatic glow period control unit -J179- Fuel pump relay -J17-	87
F16	-	Fuse 16 on fuse holder B -SB16-	30 A	-	ABS control unit -J104- ABS hydraulic pump -V64-	30
F17	-	Fuse 17 on fuse holder B -SB17-	15 A	-	High tone horn -H2- Low tone horn -H7-	30
F18	-	Fuse 18 on fuse holder B -SB18-	30 A	-	Amplifier -R12- Amplifier with bass loudspeaker, on left in luggage compartment -R44-	30
F19	-	Fuse 19 on fuse holder B -SB19-	30 A	-	Wiper motor control unit -J400-	30
F21	-	Fuse 21 on fuse holder B -SB21-	15 A	-	Lambda probe heater -Z19- Lambda probe 2 heater -Z28- Lambda probe 1 heater after catalytic converter -Z29-	87
			10 A	-	Lambda probe heater -Z19-
F22	-	Fuse 22 on fuse holder B -SB22-	5 A	-	Brake pedal switch -F63- Clutch position sender -G476-	87
F23	-	Fuse 23 on fuse holder B -SB23-	15 A	-	Fuel pressure regulating valve -N276-	87
			10 A	-	Exhaust gas recirculation valve -N18- Charge pressure control solenoid valve -N75- Exhaust gas recirculation valve 2 -N213- Exhaust gas recirculation cooler change-over valve -N345-
			5 A	-	Secondary air pump relay -J299-
F24	-	Fuse 24 on fuse holder B -SB24-	10 A	-	Map-controlled engine cooling system thermostat -F265- Activated charcoal filter system solenoid valve 1 -N80- Variable intake manifold change-over valve -N156- Camshaft​ control​ valve​ 1 -N205- Intake manifold flap motor -V157-	87
F25	-	Fuse 25 on fuse holder B -SB25-	40 A	-	Onboard supply control unit -J519- (right side light, right main beam, right dipped beam, right turn signal, right fog light)	30
F26	-	Fuse 26 on fuse holder B -SB26-	40 A	-	Onboard supply control unit -J519- (left side light, left main beam, left dipped beam, left turn signal, left fog light)	30
F27	-	Fuse 27 on fuse holder B -SB27-	50 A	-	Automatic glow period control unit -J179- Glow plug 1 -Q10- Glow plug 2 -Q11- Glow plug 3 -Q12- Glow plug 4 -Q13-	87
			40 A		Secondary air pump motor -V101-
F28	-	Fuse 28 on fuse holder B -SB28-	40 A	-	Terminal 15 voltage supply relay 2 -J681- Supply for the fuses: -SC1- up to -SC6-, -SC7- up to -SC11-, -SC29- up to -SC31-, -SC39-, -SC47-, -SC49-	30
F29	-	Fuse 29 on fuse holder B -SB29-	50 A	-	Supply for the fuses: -SC18-, -SC20-, -SC32- up to -SC37-, -SC44-, -SC45-, -SC48-, -S131-	30
F30	-	Fuse 30 on fuse holder B -SB30-	50 A 1	-	X-contact relief relay -J59- Supply for the fuses: -SC40-, -SC41-, -SC42-, -SC46-	30

Note: 1 Fuse was increased from 40 A to 50 A, applicable from November 2005

AUDI A3 2008 Position of fuses electronics box low, from model year 2007

Position of fuses electronics box low, from model year 2007

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
F1	-	Fuse 1 on fuse holder B -SB1-	40 A	-	Voltage stabiliser -J532- Supply for the fuses: -SC7- up to -SC11- only models with stop/start system applicable from model year 2010	30
F1	-	Fuse 1 on fuse holder B -SB1-	40 A	-	Supply for the fuses: -SC7- up to -SC10- only models without stop/start system applicable from model year 2010	30
F2	-	Fuse 2 on fuse holder B -SB2-	5 A	-	Steering column electronics control unit -J527- is dropped from model year 2009	30
F2	-	Fuse 2 on fuse holder B -SB2-	30 A	-	Mechatronic unit for dual clutch gearbox -J743- (7-speed dual clutch gearbox 0AM) applicable from model year 2009	30
F2	-	Fuse 2 on fuse holder B -SB2-	20 A	-	Fuel pressure regulating valve -N276- (CBFA) applicable from model year 2009 is dropped from May 2011	30
F2	-	Fuse 2 on fuse holder B -SB2-	15 A	-	Fuel pressure regulating valve -N276- (CBFA) applicable from May 2011	30
F3	-	Fuse 3 on fuse holder B -SB3-	5 A	-	Onboard supply control unit -J519-	30
F3	-	Fuse 3 on fuse holder B -SB3-	5 A	-	Battery​ monitor​ control​ unit​ -J367- applicable from model year 2010	30
F4	-	Fuse 4 on fuse holder B -SB4-	30 A	-	ABS control unit -J104- (MK60 ESP valves) ABS control unit -J104- (MK70 ABS valves) is dropped from model year 2009	30
F4	-	Fuse 4 on fuse holder B -SB4-	20 A	-	ABS control unit -J104- (MK60 ESP valves) applicable from model year 2009	30
F5	-	Fuse 5 on fuse holder B -SB5-	15 A	-	Mechatronic unit for dual clutch gearbox -J743-	30
F6	-	Fuse 6 on fuse holder B -SB6-	5 A	-	Control unit in dash panel insert -J285- is dropped from model year 2010	30
F6	-	Fuse 6 on fuse holder B -SB6-	5 A	-	Steering column electronics control unit -J527- applicable from model year 2009	30
F7	-	Fuse 7 on fuse holder B -SB7-	20 A	-	Fuel pressure regulating valve -N276- (CBFA) is dropped from model year 2009	30
F8	-	Fuse 8 on fuse holder B -SB8-	15 A	-	Navigation operating electronics control unit -J402- Control​ unit​ with​ display​ for​ radio​ and​ navigation system -J503- Radio -R- is dropped from model year 2010	30
F8	-	Fuse 8 on fuse holder B -SB8-	25 A	-	Control​ unit​ with​ display​ for​ radio​ and​ navigation -J503-1 with radio navigation system (models for Japan) only is dropped from model year 2010	30
F9	-	Fuse 9 on fuse holder B -SB9-	5 A	-	Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401-1 Navigation system tuner for TV -J415-1 Satellite radio -R146- Telephone transmitter and receiver unit -R36- Aerial​ amplifier​ for​ mobile​ telephone -R86-1 18-pin connector -T18a- (VDA interface) 1 is dropped from model year 2010	30
F10	-	Fuse 10 on fuse holder B -SB10-	5 A	-	Terminal​ 30​ voltage​ supply​ relay​ -J317- (BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA)	30
F10		Fuse 10 on fuse holder B -SB10-	5 A	-	Engine control units -J...- (CMSA, CAXC, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CBZB, CFFA, CFFB, CFGB, CLJA) Motronic​ current​ supply​ relay​ -J271- (CAXC, CBZB)	30
F10	-	Fuse 10 on fuse holder B -SB10-	10 A	-	Engine control units -J...- (BLF, BPT, BPU, BVZ, BVY, BZB, CAWB, CBFA, CCTA, CDAA, CCZA) Motronic​ current​ supply​ relay -J271- (BLF, BPT, BPU, BVZ, BVY, BZB, CAWB, CBFA, CCTA, CDAA, CCZA)	30
F11	-	Fuse 11 on fuse holder B -SB11-	20 A	-	Auxiliary heater control unit -J364-1 is dropped from November 2010	30
F11	-	Fuse 11 on fuse holder B -SB11-	30 A	-	Auxiliary heater control unit -J364-1 applicable from November 2010	30
F12	-	Fuse 12 on fuse holder B -SB12-	5 A	-	Data bus diagnostic interface -J533-	30
F13	-	Fuse 13 on fuse holder B -SB13-	30 A	-	Engine control units -J...- (BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA)	87
			25 A		Engine control units -J...- (BLF, BPT, BPU, BYT, BVZ, BVY, BSE, BSF) is dropped from May 2007, for models with engine codes BSE, BSF only
			15 A		Engine control units -J...- (CMSA, CAXC, BZB, CAWB, CBFA, CCTA, CDAA, CCZA, CBZB) applicable from May 2007, for models with engine codes BSE, BSF, CCSA, CMXA only
F14		Fuse 14 on fuse holder B -SB14-	20 A	-	Ignition​ coil​ 1​ with​ output​ stage​ -N- (BSE, BSF, CCSA, CBZB, CMXA) Ignition coil 2 -N128- (BSE, BSF, CCSA, CBZB, CMXA)	87
F14	-	Fuse 14 on fuse holder B -SB14-	20 A	-	Ignition coil 1 with output stage -N70- Ignition coil 2 with output stage -N127- Ignition coil 3 with output stage -N291- Ignition coil 4 with output stage -N292- for models with engine codes BLF, BPT, BPU, BYT, BVZ, BVY, CAXC, CMSA, BZB, CAWB, CBFA, CCTA, CDAA, CCZA only	87
F14	-	Fuse 14 on fuse holder B -SB14-	20 A	-	Fuel pressure regulating valve -N276- (CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA) Fuel metering valve -N290- (CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA) is dropped from May 2011	87
F14	-	Fuse 14 on fuse holder B -SB14-	15 A	-	Fuel pressure regulating valve -N276- (CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA) Fuel metering valve -N290- (CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA) Throttle valve module -J338- (CBEA) Radiator​ fan​ control​ unit -J293- (CBEA) applicable from May 2011	87
F15	-	Fuse 15 on fuse holder B -SB15-	15 A	-	Lambda​ probe​ 1​ heater​ after​ catalytic​ converter -Z29-(BVY) Lambda probe 2 heater after catalytic converter -Z30- (BVY) Lambda probe 3 heater after catalytic converter -Z64- (BVY)	87
F15	-	Fuse 15 on fuse holder B -SB15-	10 A	-	Lambda​ probe​ 1​ heater​ after​ catalytic​ converter -Z29- (BVZ)	87
F15	-	Fuse 15 on fuse holder B -SB15-	10 A	-	Lambda​ probe​ 1​ heater​ after​ catalytic​ converter -Z29- (CAXC, CBZB, CMSA) Lambda probe heater -Z19- (CAXC, CBZB, CMSA)	87
F15	-	Fuse 15 on fuse holder B -SB15-	10 A	-	Camshaft control valve 1 -N205- (BPT, BPU, BYT)	87
F15		Fuse 15 on fuse holder B -SB15-	10 A	-	Radiator identification sensor -G611- (CBFA) Fuel system diagnostic pump -V144- (CBFA, CCTA) Lambda​ probe​ heater -Z19- (CBFA)	87
F15	-	Fuse 15 on fuse holder B -SB15-	5 A	-	Fuel pump relay -J17- Automatic glow period control unit -J179- for models with engine codes BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA	87
F15	-	Fuse 15 on fuse holder B -SB15-	5 A	-	Low heat output relay -J359- High heat output relay -J360- for models with engine codes BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA applicable from November 2006, only for models with auxiliary air heater	87
F15	-	Fuse 15 on fuse holder B -SB15-	5 A	-	Supplementary fuel pump relay -J832- (CBBB, CBAB, CBAA, CBEA, CFFA, CFFB, CFGB, CLJA)	87
F16	-	Fuse 16 on fuse holder B -SB16-	30 A	-	ABS control unit -J104- (ABS pump) is dropped from model year 2009	30
F16	-	Fuse 16 on fuse holder B -SB16-	30 A	-	Onboard supply control unit -J519- Right side light supply, right main beam, right dipped beam, right turn signal, right fog light applicable from model year 2009	30
F17	-	Fuse 17 on fuse holder B -SB17-	15 A	-	High tone horn -H2- Low tone horn -H7-	30
F18	-	Fuse 18 on fuse holder B -SB18-	30 A	-	Amplifier -R12- Amplifier with bass loudspeaker, on left in luggage compartment -R44-	30
F18	-	Fuse 18 on fuse holder B -SB18-	30 A	-	Voltage stabiliser -J532- Amplifier -R12- Amplifier with bass loudspeaker, on left in luggage compartment -R44- only models with stop/start system applicable from model year 2010	30
F19	-	Fuse 19 on fuse holder B -SB19-	30 A	-	Wiper motor control unit -J400-	30
F20	-	Fuse 20 on fuse holder B -SB20-	20 A	-	Fuel​ pressure​ regulating​ valve​ -N276- (BYT, BPT, BPU, BZB, CAWB, CCTA, CDAA, CCZA) is dropped from May 2011	87
F20	-	Fuse 20 on fuse holder B -SB20-	15 A	-	Fuel​ pressure​ regulating​ valve​ -N276- (BYT, BPT, BPU, BZB, CAWB, CCTA, CDAA, CCZA) applicable from May 2011	87
F20	-	Fuse 20 on fuse holder B -SB20-	10 A	-	Coolant​ circulation​ pump​ -V50- (CAXC, CMSA)	87
F21	-	Fuse 21 on fuse holder B -SB21-	10 A	-	Lambda​ probe​ 3​ heater​ after​ catalytic​ converter -Z64- (CBFA)	87
F21	-	Fuse 21 on fuse holder B -SB21-	10 A	-	Lambda probe heater -Z19- (BSE, BSF, BLF, BPT, BPU, BYT, BVZ, BVY, BLS, BMM, BUY, BMN, BZB, CAWB, CCTA, CCSA, CDAA, CCZA, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB) Lambda​ probe​ 1​ heater​ after​ catalytic​ converter​ -Z29- (BSE, BSF, BLF, CCTA, CBFA, CCSA, CDAA, CCZA, CBEA) is dropped from May 2009, for models with engine codes BSF, BSE, CCSA, CCTA, CCZA, CDAA only	87
F21	-	Fuse 21 on fuse holder B -SB21-	15 A	-	Lambda probe heater -Z19- (BSE, CCSA, CCTA, CCZA, CDAA, CMXA, BSF) Lambda probe 1 heater after catalytic converter -Z29- (BSE, CCSA, CCTA, CCZA, CDAA, CMXA, BSF) applicable from model year 2010	87
F21	-	Fuse 21 on fuse holder B -SB21-	20 A	-	Vacuum​ pump​ relay​ -J57- (CAXC, CMSA) Vacuum​ pump​ for​ brakes -V192- (CAXC, CMSA)	87
F22		Fuse 22 on fuse holder B -SB22-	5 A		Clutch position sender -G476-	87
F22		Fuse 22 on fuse holder B -SB22-	5 A		Brake light switch -F- Brake pedal switch -F63- applicable from model year 2010	87
F23	-	Fuse 23 on fuse holder B -SB23-	5 A	-	Continued​ coolant​ circulation​ relay -J151- (BPT, BPU, BYT, BZB, CAWB, CCTA, CBFA, CCZA, CDAA) Secondary​ air​ pump​ relay​ -J299- (BSE, BSF, CBFA, CCSA, CMXA) Engine components current supply relay -J757- (CBFA) Continued​ coolant​ circulation​ pump​ -V51- (BPT, BPU, BYT, BZB, CAWB, CCTA, CBFA, CCZA, CDAA)	87
			10 A		Exhaust​ gas​ recirculation​ valve​ -N18- (BKC, BXE, AZV, BKD) Charge​ pressure​ control​ solenoid​ valve​ -N75- (BLS, BMM, BKC, BXE, AZV, BKD, BMN, BUY, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA) Exhaust​ gas​ recirculation​ valve​ 2​ -N213- (BKC, BXE, AZV, BKD) Intake​ manifold​ flap​ valve​ -N316- (BMN, BUY) Exhaust​ gas​ recirculation​ cooler​ change-over​ valve -N345- (BLS, BMM) Exhaust​ gas​ recirculation​ cooler​ change-over​ valve​ -N345- (BMN, BUY, CBBB, CBAB, CBAA, CAYB, CAYC, CFFA, CFFB, CFGB, CLJA)
			10 A		Air​ mass​ meter -G70- (CFFA, CFFB, CFGB, CLJA)
			15 A		Fuel​ pressure​ regulating​ valve​ -N276- (BLF, CAXC, BVY, BVZ, CBZB, CMSA)
F24	-	Fuse 24 on fuse holder B -SB24-	10 A	-	Radiator fan control unit -J293- Additional​ coolant​ pump​ relay​ -J496- (CAXC, CMSA) Engine​ component​ current​ supply​ relay​ -J757- (BPT, BPU, BYT, CAXC, CDAA, CAWB, CCZA, CCTA) Throttle valve module -J338- (CBEA) Charge​ pressure​ control​ solenoid​ valve​ -N75- (BPT, BPU, BYT, CAXC, CMSA, CAWB, BZB, CCTA, CBFA, CDAA, CCZA) Activated​ charcoal​ filter​ solenoid​ valve​ 1​ -N80- (BPT, BPU, BYT, BSE, BSF, BLF, BVY, BVZ, CMSA, CAXC, CAWB, BZB, CCTA, CBFA, CCSA, CDAA, CCZA, CBZB, CMXA) Secondary​ air​ inlet​ valve -N112- (CBFA) Variable​ intake​ manifold​ change-over​ valve -N156- (BSE, BSF, BLF, BVY, BVZ, CCSA, CMXA) Inlet​ camshaft​ control​ valve​ 1 -N205- (BLF, BVY, BVZ, CAXC, CAWB, BZB, CMSA, CCTA, CBFA, CDAA, CCZA) Turbocharger​ air​ recirculation​ valve -N249- (BPT, BPU, BYT, CMSA, CAXC, CAWB, BZB, CCTA, CBFA, CDAA, CCZA) Intake​ manifold​ flap​ valve​ -N316- (BPT, BPU, BYT, CAWB, BZB, CCTA, CBFA, CDAA, CCZA, CBZB) Oil pressure control valve -N428- Intake​ manifold​ flap​ motor​ -V157- (BKC, BXE, AZV, BKD) Pump​ for​ exhaust​ gas​ recirculation​ cooler​ -V400- (CBBB, CBAB, CBAA, CAYB, CAYC, CFFA, CFFB, CFGB, CLJA) Electrohydraulic​ engine​ mounting​ solenoid​ valve -N398- (CAYB, CAYC)	87
F25	-	Fuse 25 on fuse holder B -SB25-	30 A	-	Onboard supply control unit -J519- Right side light supply, right main beam, right dipped beam, right turn signal, right fog light is dropped from model year 2009	30
F25	-	Fuse 25 on fuse holder B -SB25-	40 A	-	ABS control unit -J104- (MK60 ESP pump) ABS control unit -J104- (MK70 ABS pump and ABS valves) applicable from model year 2009	30
F26	-	Fuse 26 on fuse holder B -SB26-	30 A	-	Onboard supply control unit -J519- Left side light supply, left main beam, left dipped beam, left turn signal, left fog light	30
F27	-	Fuse 27 on fuse holder B -SB27-	50 A	-	Automatic glow period control unit -J179- Glow plug 1 -Q10- Glow plug 2 -Q11- Glow plug 3 -Q12- Glow plug 4 -Q13- for models with engine codes BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA only	87
F27	-	Fuse 27 on fuse holder B -SB27-	40 A	-	Secondary​ air​ pump​ motor​ -V101- (BSF, BSE, CBFA, CCSA, CMXA)	87
F28	-	Fuse 28 on fuse holder B -SB28-	40 A	-	Terminal 15 voltage supply relay 2 -J681- Supply for the fuses: -SC1- up to -SC6-, -SC29- up to -SC31-, -SC46-, -SC47-, -SC49- is dropped from model year 2009	30
F29	-	Fuse 29 on fuse holder B -SB29-	50 A	-	B300 Positive connection 4 (30), in main wiring harness Supply for the fuses: -SC32- up to -SC37-, -SC44-, -SC45-, -SC48-, -S131- is dropped from model year 2009	30
F29	-	Fuse 29 on fuse holder B -SB29-	50 A	-	B300 Positive connection 4 (30), in main wiring harness Supply for the fuses: -SC32- up to -SC37-, -SC39-, -SC44-, -SC45-, -SC48-, -S131- applicable from model year 2009	30
F30	-	Fuse 30 on fuse holder B -SB30-	50 A	-	X-contact relief relay -J59- Supply for the fuses: -SC40-, -SC41-, -SC42- is dropped from model year 2009	30
F30	-	Fuse 30 on fuse holder B -SB30-	50 A	-	Terminal 15 voltage supply relay 2 -J681- Supply for the fuses: -SC1- up to -SC6-, -SC19-, -SC20-, -SC29- up to -SC31-, -SC40-, -SC41-, -SC42-, -SC46-, -SC47-, -SC49- applicable from model year 2009	30

1 not for models with US equipment

AUDI A3 2008 Location fuse holder B SB on electronics box high, in left of engine compartment

Location fuse holder B -SB- on electronics box high, in left of engine compartment

Fuse colours

50A - red

40A - orange

30A - light-green

25A - natural (white)

20 A - yellow

15A - light blue

10A - red

7.5A - brown

5A - light-brown

3 A - purple

AUDI A3 2008 Position of fuses electronics box high, from model year 2004

Position of fuses electronics box high, from model year 2004

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
F1	-	Fuse 1 on fuse holder B -SB1-	30 A	-	ABS hydraulic pump -V64-	30
F2	-	Fuse 2 on fuse holder B -SB2-	30 A	-	ABS​ hydraulic​ unit -N55-	30
F3	-	Fuse 3 on fuse holder B -SB3-	20 A	-	Convenience system central control unit -J393-	30
F4	-	Fuse 4 on fuse holder B -SB4-	5 A	-	Onboard supply control unit -J519- for models with battery in engine compartment only	30
F5	-	Fuse 5 on fuse holder B -SB5-	20 A	-	High tone horn -H2- Low tone horn -H7-	30
F6	-	Fuse 6 on fuse holder B -SB6-	7.5 A	-	Fuel pressure regulating valve -N276-1 is dropped, from model year 2005	87 (30a)
			15 A	-	Fuel pressure regulating valve -N276-1 applicable from model year 2005
			20 A	-	Output stage -N122-1
			30 A	-	Ignition coil 1 with output stage -N70- Ignition coil 2 with output stage -N127- Ignition coil 3 with output stage -N291- Ignition coil 4 with output stage -N292- Ignition coil 5 with output stage -N323-1 Ignition coil 6 with output stage -N324-1
F7	-	Fuse 7 on fuse holder B -SB7-	5 A	-	Brake light switch -F- Brake pedal switch -F63- Clutch travel sender -G162-	87 (30a)
F8	-	Fuse 8 on fuse holder B -SB8-	10 A	-	Map-controlled​ engine​ cooling​ system​ thermostat -F265-1 Radiator fan control unit -J293- Exhaust​ gas​ recirculation​ valve -N18-1 Activated​ charcoal​ filter​ system​ solenoid​ valve 1​ -N80-1 Variable​ intake​ manifold​ change-over​ valve -N156-1 Camshaft​ control​ valve​ 1 -N205- Exhaust​ camshaft​ control​ valve​ 1 -N318-1 Intake​ manifold​ flap​ motor -V157-1	87 (30a)
F9	-	Fuse 9 on fuse holder B -SB9-	10 A	-	Fuel pump relay -J17-1 Continued coolant circulation relay -J151- Automatic​ glow​ period​ control​ unit -J179-1 NOx​ sensor​ control​ unit -J583-1 Continued coolant circulation pump -V51- NOx​ sender​ heater -Z44-1	87 (30a)
F10	-	Fuse 10 on fuse holder B -SB10-	10 A	-	Secondary​ air​ pump​ relay -J299-1 Exhaust​ gas​ recirculation​ valve -N18-1 Charge​ pressure​ control​ solenoid​ valve -N75-1 Secondary air inlet valve -N112-1 Exhaust gas recirculation valve 2 -N213-1 Exhaust flap valve -N220-1 Lambda​ probe​ 1​ heater​ after​ catalytic​ converter -Z29-1 Lambda​​ probe​​ 2​​ heater​​ after​​ catalytic​​ converter -Z30-1 Fuel​ system​ diagnostic​ pump -V144-	87 (30a)
F11	-	Fuse 11 on fuse holder B -SB11-	25 A	-	Motronic control unit -J220- Simos​ control​ unit​ -J361-1	87 (30a)
			30 A	-	Diesel​ direct​ injection​ system​ control​ unit​ -J248-1
F12	-	Fuse 12 on fuse holder B -SB12-	15 A	-	NOx​ sensor​ control​ unit -J583-1 Lambda​ probe​ heater -Z19-1 Lambda​ probe​ 2 heater -Z28-1 NOx​ sender​ heater -Z44-1	87 (30a)
F13	-	Fuse 13 on fuse holder B -SB13-	20 A	-	Mechatronic unit for dual clutch gearbox -J743-	30
F14	-	Not assigned	-	-		-
F15	-	Fuse 15 on fuse holder B -SB15-	40 A	-	Starter -B-	87 (50)
F16	-	Fuse 16 on fuse holder B -SB16-	15 A	-	Steering column electronics control unit -J527-	30
F17	-	Fuse 17 on fuse holder B -SB17-	10 A	-	Control unit in dash panel insert -J285-	30
F18		Fuse 18 on fuse holder B -SB18-	30 A	-	Amplifier -R12- Amplifier with bass loudspeaker, on left in luggage compartment -R44-	30
F19	-	Fuse 19 on fuse holder B -SB19-	15 A	-	Radio -R- Navigation operating electronics control unit -J402-	30
F20	-	Fuse 20 on fuse holder B -SB20-	5 A	-	Telephone transmitter and receiver unit -R36- Aerial​ amplifier​ for​ mobile​ telephone -R86-1	30
F21	-	Fuse 21 on fuse holder B -SB21-	10 A	-	Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401- Navigation system tuner for TV -J415-1	30
F22	-	Not assigned	-	-		-
F23	-	Not assigned	-	-		-
F24	-	Fuse 24 on fuse holder B -SB24-	10 A	-	Data bus diagnostic interface -J533-	30
F25	-	Not assigned	-	-
F26	-	Fuse 26 on fuse holder B -SB26-	10 A	-	Motronic control unit -J220- Motronic current supply relay -J271-	30
			5 A	-	Terminal​ 30​ voltage​ supply​ relay​ -J317-1
F27	-	Fuse 21 on fuse holder B -SB21-	10 A	-	Crankcase​ breather​ heater​ element -N79-1 for models with heater element only	87 (15)
			5 A	-	Crankcase​ breather​ heater​ element -N79-1 for models with heater element only	87 (15)
F28		Fuse 28 on fuse holder B -SB28-	20 A	-	Automatic​​ gearbox​​ control​​ unit -J217-1	87 (15)
F29	-	Fuse 29 on fuse holder B -SB29-	10 A	-	Injector,​ cylinder​ 1 -N30-1 Injector,​ cylinder​ 2 -N31-1 Injector,​ cylinder​ 3 -N32-1 Injector,​ cylinder​ 4 -N33-1 Injector,​ cylinder​ 5 -N83-1 Injector,​ cylinder​ 6 -N84-1	87 (15)
			20 A		Ignition coil 1 with output stage -N70-1 Ignition coil 2 with output stage -N127-1 Ignition coil 3 with output stage -N291-1 Ignition coil 4 with output stage -N292-1
F30	-	Fuse 30 on fuse holder B -SB30-	20 A	-	Auxiliary heater control unit -J364-1	30
F31	-	Fuse 31 on fuse holder B -SB31-	30 A	-	Wiper motor control unit -J400-	30
F32	-	Fuse 32 on fuse holder B -SB32-	10 A	-	Injector,​ cylinder​ 1 -N30-1 Injector,​ cylinder​ 2 -N31-1 Injector,​ cylinder​ 3 -N32-1 Injector,​ cylinder​ 4 -N33-1 Charge pressure control solenoid valve -N75- Activated charcoal filter system solenoid valve 1 -N80- Turbocharger air recirculation valve -N249-	87 (15a)
F33	-	Fuse 33 on fuse holder B -SB33-	15 A	-	Fuel​ system​ pressurisation​ pump -G6-1	87 (15a)
F33	-	Fuse 33 on fuse holder B -SB33-	7.5 A	-	Fuel pressure regulating valve -N276- is dropped, from model year 2005	87 (15a)
F33	-	Fuse 33 on fuse holder B -SB33-	15 A	-	Fuel pressure regulating valve -N276- applicable from model year 2005	87 (15a)
F34	-	Not assigned	-	-		-
F35	-	Not assigned	-	-		-
F36	-	Not assigned	-	-		-
F37	-	Not assigned	-	-		-
F38	-	Fuse 38 on fuse holder B -SB38-	10 A	-	Left headlight range control motor -V48- Right headlight range control motor -V49-	87 (15)
F39	-	Fuse 39 on fuse holder B -SB39-	5 A	-	Oil level and oil temperature sender -G266-	87 (15)
F40	-	Fuse 40 on fuse holder B -SB40-	20 A	-	Supply for the fuses: -SC1- up to -SC6-, -SC7- up to -SC11-, -SC29- up to -SC31- for models with battery in engine compartment only	87 (15)
F41	-	Fuse 41 on fuse holder B -SB41-	10 A	-	Air mass meter -G70-	87 (15)
F42	-	Fuse 42 on fuse holder B -SB42-	5 A	-	Fuel pump relay -J17-	87 (15)
			10 A	-	Air mass meter -G70-1
F43	-	Fuse 43 on fuse holder B -SB43-	20 A	-	Vacuum​ pump​ relay -J57-1 for petrol engines with automatic gearbox only	87 (15)
F44	-	Fuse 44 on fuse holder B -SB44-	10 A	-	Air mass meter -G70-1 Fuel​ system​ diagnostic​ pump -V144-	87 (15a)
F45	-	Fuse 45 on fuse holder B -SB45-	10 A	-	Lambda probe heater -Z19- Lambda​ probe​ 1​ heater​ after​ catalytic​ converter -Z29-1	87 (15a)
			15 A	-	Lambda​ probe​ heater -Z19-1 Lambda​ probe​ 1​ heater​ after​ catalytic​ converter -Z29-1
F46	-	Fuse 46 on fuse holder B -SB46-	10 A	-	Lambda​ probe​ 2 heater -Z28-1 Lambda probe 1 heater after catalytic converter -Z29- Lambda​​ probe​​ 2​​ heater​​ after​​ catalytic​​ converter -Z30-1	87 (15a)
F47	-	Fuse 47 on fuse holder B -SB47-	40 A	-	Onboard supply control unit -J519- Left side light supply, left main beam, left dipped beam, left turn signal, left fog light	30
F48	-	Fuse 48 on fuse holder B -SB48-	40 A	-	Onboard supply control unit -J519- Right side light supply, right main beam, right dipped beam, right turn signal, right fog light	30
F49	-	Fuse 49 on fuse holder B -SB49-	30 A	-	Terminal 15 voltage supply relay 2 -J681- Supply for the fuses: -SC1- up to -SC6-, -SC7- up to -SC11-, -SC29- up to -SC31- for models with battery in luggage compartment only	30
F50	-	Not assigned	-	-	-	-
F51	-	SB51 - Fuse 51 on fuse holder	40 A	-	Secondary​ air​ pump​ relay -J299-1 Secondary​ air​ pump​ motor -V101-1	30
			50 A	-	Automatic​ glow​ period​ control​ unit -J179-1
F52	-	SB52 - Fuse 52 on fuse holder	50 A	-	X-contact relief relay -J59- Supply for the fuses: -SC40-, -SC41-, -SC42-, -SC46-	30
F53	-	SB53 - Fuse 53 on fuse holder	50 A	-	Supply for the fuses: -SC32- up to -SC37-, -SC44-, -SC45- for models with battery in engine compartment only	30
			50 A	-	Supply for the fuses: -SC32- up to -SC37- for models with battery in luggage compartment only	30
F54	-		50 A	-	Radiator​​ fan​​ thermal​​ switch -F18-1 Radiator​ fan​ control​ unit​ -J293- J293 radiator fan control unit	30

1 not for models with US equipment

AUDI A3 2008 Position of fuses electronics box high, from model year 2006

Position of fuses electronics box high, from model year 2006

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
F1	-	Fuse 1 on fuse holder B -SB1-	30 A	-	ABS control unit -J104- ABS hydraulic pump -V64-	30
F2	-	Fuse 2 on fuse holder B -SB2-	30 A	-	ABS control unit -J104- ABS​ hydraulic​ unit -N55-	30
F3	-	Fuse 3 on fuse holder B -SB3-	20 A	-	Convenience system central control unit -J393-	30
F4	-	Fuse 4 on fuse holder B -SB4-	5 A	-	Onboard supply control unit -J519-	30
F5	-	Fuse 5 on fuse holder B -SB5-	15 A	-	High tone horn -H2- Low tone horn -H7-	30
F6	-	Fuse 6 on fuse holder B -SB6-	15 A	-	Fuel pressure regulating valve -N276- Fuel system pressurisation pump -G6-	87
F7	-	Not assigned	-	-		-
F8	-	Not assigned	-	-		-
F9	-	Fuse 9 on fuse holder B -SB9-	10 A	-	Charge pressure control solenoid valve -N75- Activated charcoal filter system solenoid valve 1 -N80- Turbocharger air recirculation valve -N249-	87
F10	-	Fuse 10 on fuse holder B -SB10-	10 A	-	Air mass meter -G70- Fuel​ system​ diagnostic​ pump -V144-	87
F11	-	Fuse 11 on fuse holder B -SB11-	10 A	-	Lambda probe heater -Z19- Lambda probe 2 heater -Z28-	87
F12	-	Fuse 12 on fuse holder B -SB12-	10 A	-	Lambda probe 1 heater after catalytic converter -Z29- Lambda probe 2 heater after catalytic converter -Z30-	87
F13	-	Fuse 13 on fuse holder B -SB13-	15 A	-	Mechatronic unit for dual clutch gearbox -J743-	30
F14	-	Not assigned	-	-		-
F15	-	Fuse 15 on fuse holder B -SB15-	10 A	-	Continued coolant circulation pump -V51-	87
F16	-	Fuse 16 on fuse holder B -SB16-	5 A	-	Steering column electronics control unit -J527-	30
F17	-	Fuse 17 on fuse holder B -SB17-	5 A	-	Control unit in dash panel insert -J285-	30
F18	-	Fuse 18 on fuse holder B -SB18-	30 A	-	Amplifier -R12- Amplifier with bass loudspeaker, on left in luggage compartment -R44-	30
F19	-	Fuse 19 on fuse holder B -SB19-	15 A	-	Radio -R- Navigation operating electronics control unit -J402-	30
F20	-	Fuse 20 on fuse holder B -SB20-	5 A	-	Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401-1 Navigation system tuner for TV -J415-1 Telephone transmitter and receiver unit -R36- Aerial​ amplifier​ for​ mobile​ telephone -R86-1 Satellite radio -R146-	30
F21	-	Not assigned	-	-		-
F22	-	Not assigned	-	-		-
F23	-	Fuse 23 on fuse holder B -SB23-	5 A	-	Motronic control unit -J220- Motronic current supply relay -J271-	30
F24	-	Fuse 24 on fuse holder B -SB24-	5 A	-	Data bus diagnostic interface -J533-	30
F25	-	Not assigned	-	-		-
F26	-	Not assigned	-	-		-
F27	-	Not assigned	-	-		-
F28	-	Fuse 28 on fuse holder B -SB28-	25 A	-	Motronic control unit -J220-	87
F29	-	Fuse 29 on fuse holder B -SB29-	5 A	-	Continued coolant circulation relay -J151- Secondary air pump relay -J299-	87
F30	-	Fuse 30 on fuse holder B -SB30-	20 A	-	Auxiliary heater control unit -J364-	30
F31	-	Fuse 31 on fuse holder B -SB31-	30 A	-	Wiper motor control unit -J400-	30
F32	-	Not assigned	-	-		-
F33	-	Not assigned	-	-		-
F34	-	Not assigned	-	-		-
F35	-	Not assigned	-	-		-
F36	-	Not assigned	-	-		-
F37	-	Not assigned	-	-		-
F38	-	Fuse 38 on fuse holder B -SB38-	10 A	-	Activated​ charcoal​ filter​ system​ solenoid​ valve 1​ -N80-1 Variable​ intake​ manifold​ change-over​ valve -N156-1 Camshaft​ control​ valve​ 1 -N205- Exhaust​ camshaft​ control​ valve​ 1 -N318-1 Radiator fan control unit -J293-	87
F39	-	Fuse 39 on fuse holder B -SB39-	5 A	-	Brake pedal switch -F63- Clutch position sender -G476-	87
F40	-	Fuse 40 on fuse holder B -SB40-	20 A	-	Ignition coil 1 with output stage -N70- Ignition coil 2 with output stage -N127- Ignition coil 3 with output stage -N291- Ignition coil 4 with output stage -N292-	87
F41	-	Not assigned	-	-		-
F42	-	Fuse 42 on fuse holder B -SB42-	5 A	-	Engine component current supply relay -J757-	87
F43	-	Fuse 43 on fuse holder B -SB43-	30 A	-	Ignition coil 1 with output stage -N70- Ignition coil 2 with output stage -N127- Ignition coil 3 with output stage -N291- Ignition coil 4 with output stage -N292- Ignition coil 5 with output stage -N323- Ignition coil 6 with output stage -N324-	87
F44	-	Not assigned	-	-		-
F45	-	Not assigned	-	-		-
F46	-	Not assigned	-	-		-
F47	-	Fuse 47 on fuse holder B -SB47-	40 A	-	Onboard supply control unit -J519- Left side light supply, left main beam, left dipped beam, left turn signal, left fog light	30
F48	-	Fuse 48 on fuse holder B -SB48-	40 A	-	Onboard supply control unit -J519- Right side light supply, right main beam, right dipped beam, right turn signal, right fog light	30
F49	-	Fuse 49 on fuse holder B -SB49-	40 A	-	J681 - Terminal 15 voltage supply relay 2 Supply for the fuses: -SC1- up to -SC6-, -SC7- up to -SC11-, -SC29- up to -SC31-, -SC47-, -SC49-	30
F50	-	Not assigned	-	-		-
F51	-	Fuse 51 on fuse holder B -SB51-	40 A	-	Secondary air pump relay -J299- Secondary air pump motor -V101-	30
F52	-	Fuse 52 on fuse holder B -SB52-	50 A 2	-	X-contact relief relay -J59- Supply for the fuses: -SC40-, -SC41-, -SC42-, -SC46-	30
F53	-	Fuse 53 on fuse holder B -SB53-	50 A	-	Supply for the fuses: -SC18-, -SC20-, -SC32- up to -SC37-, -SC44-, -SC45-, -SC48-, -S131-	30

1 not for models with US equipment 2 Fuse was increased from 40 A to 50 A, applicable from November 2005

AUDI A3 2008 Position of fuses electronics box high, from model year 2007

Position of fuses electronics box high, from model year 2007

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
F1	-	Fuse 1 on fuse holder B -SB1-	30 A	-	ABS control unit -J104- (ABS pump) is dropped from model year 2009	30
F1	-	Fuse 1 on fuse holder B -SB1-	30 A	-	Onboard supply control unit -J519- Right side light supply, right main beam, right dipped beam, right turn signal, right fog light applicable from model year 2009	30
F2	-	Fuse 2 on fuse holder B -SB2-	30 A	-	ABS control unit -J104- (MK60 ESP valves) ABS control unit -J104- (MK70 ABS valves) is dropped from model year 2009	30
F2	-	Fuse 2 on fuse holder B -SB2-	20 A	-	ABS control unit -J104- (MK60 ESP valves) applicable from model year 2009	30
F3	-	Fuse 3 on fuse holder B -SB3-	40 A	-	Voltage stabiliser -J532- Supply for the fuses: -SC7- up to -SC11- only models with stop/start system applicable from model year 2010	30
F3	-	Fuse 3 on fuse holder B -SB3-	40 A	-	Supply for the fuses: -SC7- up to -SC10- only models without stop/start system applicable from model year 2010	30
F4	-	Fuse 4 on fuse holder B -SB4-	5 A	-	Onboard supply control unit -J519-	30
F5	-	Fuse 5 on fuse holder B -SB5-	15 A	-	High tone horn -H2- Low tone horn -H7-	30
F6	-	Fuse 6 on fuse holder B -SB6-	15 A	-	Fuel​ pressure​ regulating​ valve​ -N276- (BPY, BWA, BHZ, BZC, CDLC)	87
F6	-	Fuse 6 on fuse holder B -SB6-	15 A	-	Fuel system pressurisation pump -G6- Injector,​ cylinder​ 1 -N30- Injector,​ cylinder​ 2 -N31- Injector,​ cylinder​ 3 -N32- Injector,​ cylinder​ 4 -N33- Injector,​ cylinder​ 5 -N83- Injector,​ cylinder​ 6 -N84- for models with engine codes BUB only is dropped from model year 2009	87
F7	-	Fuse 7 on fuse holder B -SB7-	15 A	-	Fuel system pressurisation pump -G6- Injector,​ cylinder​ 1 -N30- Injector,​ cylinder​ 2 -N31- Injector,​ cylinder​ 3 -N32- Injector,​ cylinder​ 4 -N33- Injector,​ cylinder​ 5 -N83- Injector,​ cylinder​ 6 -N84- for models with engine codes BUB, CBRA only applicable from model year 2009	87
F7	-	Fuse 7 on fuse holder B -SB7-	15 A	-	Fuel​ pressure​ regulating​ valve -N276- (CDLA, CDLC, BPY, BZC) applicable from model year 2009	87
F7		Fuse 7 on fuse holder B -SB7-	30 A		Fuel​ pump​ control​ unit -J538- (CEPA, CEPB)	87
F8	-	Not assigned		-
F9	-	Fuse 9 on fuse holder B -SB9-	10 A	-	Charge pressure control solenoid valve -N75- Activated charcoal filter system solenoid valve 1 -N80- Turbocharger air recirculation valve -N249- for models with engine codes BPY, BWA, BHZ, CDLA, CDLC, BZC only	87
F9	-	Fuse 9 on fuse holder B -SB9-	15 A	-	Charge pressure control solenoid valve -N75- Activated charcoal filter system solenoid valve 1 -N80- Turbocharger air recirculation valve -N249- Fuel metering valve -N290- Exhaust​ flap​ valve 1 -N321- for models with engine code CEPA, CEPB only	87
F10	-	Fuse 10 on fuse holder B -SB10-	10 A	-	Fuel​ system​ diagnostic​ pump​ -V144- (BPY, BWA, BHZ, BZC, CDLA, CDLC)	87
F10	-	Fuse 10 on fuse holder B -SB10-	10 A	-	Air​ mass​ meter​ -G70- (BUB, CBRA)	87
F11	-	Fuse 11 on fuse holder B -SB11-	10 A	-	Lambda​ probe​ heater​ -Z19- (BPY, BWA, BHZ, CDLA, CDLC, BZC)	87
F11	-	Fuse 11 on fuse holder B -SB11-	10 A	-	Lambda probe heater -Z19- (BUB, CBRA) Lambda probe 2 heater -Z28- (BUB, CBRA)	87
F12	-	Fuse 12 on fuse holder B -SB12-	10 A	-	Lambda​ probe​ 1​ heater​ after​ catalytic​ converter​ -Z29- (BPY, BWA, BHZ, CDLA, CDLC, BZC)	87
F12	-	Fuse 12 on fuse holder B -SB12-	10 A	-	Lambda probe 1 heater after catalytic converter -Z29- (BUB, CBRA) Lambda probe 2 heater after catalytic converter -Z30- (BUB, CBRA)	87
F13	-	Fuse 13 on fuse holder B -SB13-	15 A	-	Mechatronic unit for dual clutch gearbox -J743-	30
F14	-	Not assigned	-	-
F15	-	Fuse 15 on fuse holder B -SB15-	10 A	-	Continued coolant circulation pump -V51-	87
F15	-	Fuse 15 on fuse holder B -SB15-	10 A	-	Refrigerant​ circulation​ solenoid​ valve -N492- (CEPA, CEPB)	87
F16	-	Fuse 16 on fuse holder B -SB16-	5 A	-	Steering column electronics control unit -J527- is dropped from model year 2009	30
F17	-	Fuse 17 on fuse holder B -SB17-	5 A	-	Control unit in dash panel insert -J285- is dropped from model year 2010	30
F17	-	Fuse 17 on fuse holder B -SB17-	5 A	-	Steering column electronics control unit -J527- applicable from model year 2009	30
F18	-	Fuse 18 on fuse holder B -SB18-	30 A	-	Amplifier -R12- Amplifier with bass loudspeaker, on left in luggage compartment -R44-	30
F18	-	Fuse 18 on fuse holder B -SB18-	30 A	-	Voltage stabiliser -J532- Amplifier -R12- Amplifier with bass loudspeaker, on left in luggage compartment -R44- only models with stop/start system applicable from model year 2010	30
F19	-	Fuse 19 on fuse holder B -SB19-	25 A	-	Control​ unit​ with​ display​ for​ radio​ and​ navigation system -J503- with radio navigation system (models for Japan) only not for models with US equipment is dropped from model year 2010	30
F19	-	Fuse 19 on fuse holder B -SB19-	15 A	-	Navigation operating electronics control unit -J402- Control​ unit​ with​ display​ for​ radio​ and​ navigation system -J503- Radio -R- is dropped from model year 2010	30
F20	-	Fuse 20 on fuse holder B -SB20-	5 A	-	Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401- Navigation system tuner for TV -J415- Telephone transmitter and receiver unit -R36- Aerial​ amplifier​ for​ mobile​ telephone -R86- is dropped from model year 2010	30
F20	-	Fuse 20 on fuse holder B -SB20-	5 A	-	18-pin connector -T18a- (VDA interface) not for models with US equipment is dropped from model year 2010	30
F20	-	Fuse 20 on fuse holder B -SB20-	5 A	-	Satellite radio -R146- for models with US equipment only is dropped from model year 2010	30
F20	-	Fuse 20 on fuse holder B -SB20-	5 A	-	Telephone transmitter and receiver unit -R36- is dropped from model year 2010	30
F21	-	Not assigned		-
F22	-	Not assigned		-
F23	-	Fuse 23 on fuse holder B -SB23-	10 A	-	Engine control units -J...- Motronic current supply relay -J271- not for models with engine code CEPA, CEPB	30
F23	-	Fuse 23 on fuse holder B -SB23-	5 A	-	Engine control unit -J623- Motronic current supply relay -J271- Control relay -J789- for models with engine code CEPA, CEPB only	30
F24	-	Fuse 24 on fuse holder B -SB24-	5 A	-	Data bus diagnostic interface -J533-	30
F25	-	Not assigned	-	-
F26	-	Not assigned	-	-
F27	-	Fuse 27 on fuse holder B -SB27-	5 A	-	Exhaust​ flap​ valve​ -N220- (BHZ, CDLA, CDLC, BZC)	87
F27	-	Fuse 27 on fuse holder B -SB27-	15 A	-	Lambda​ probe​ heater -Z19- (CEPA, CEPB)	87
F28	-	Fuse 28 on fuse holder B -SB28-	15 A	-	Lambda​ probe​ 1​ heater​ after​ catalytic​ converter -Z29- (CEPA, CEPB)	87
F28	-	Fuse 28 on fuse holder B -SB28-	25 A	-	Engine control units -J...- (BHZ, BUB, BWA, BPY, CDLA, BZC, CDLC, CDLA) Is dropped from May 2007, for models with engine codes BUB, BHZ, BWA, BPY, CDLA, CDLC only	87
F28	-	Fuse 28 on fuse holder B -SB28-	15 A	-	Engine control units -J...- Applicable from May 2007, for models with engine codes BUB, BHZ, BWA, BPY, CDLA, CDLC, CBRA, BZC only	87
F29	-	Fuse 29 on fuse holder B -SB29-	5 A	-	Continued​ coolant​ circulation​ relay -J151- (BWA, BPY, BZC, BHZ, BUB, CDLA, CDLC, CBRA) Secondary​ air​ pump​ relay​ -J299- (BUB, CBRA)	87
F29	-	Fuse 29 on fuse holder B -SB29-	15 A	-	Additional​ coolant​ pump​ relay -J496- (CEPA, CEPB) Exhaust​ gas​ temperature​ sender​ 1 -G235- (CEPA, CEPB) Camshaft​​ control​​ valve​​ 1 -N205- (CEPA, CEPB) Intake​ manifold​ flap​ valve -N316- (CEPA, CEPB) Exhaust​ camshaft​ control​ valve​ 1 -N318- (CEPA, CEPB) Oil​ pressure​ control​ valve -N428- (CEPA, CEPB)	87
F30	-	Fuse 30 on fuse holder B -SB30-	20 A	-	Auxiliary heater control unit -J364- is dropped from November 2010	30
F30	-	Fuse 30 on fuse holder B -SB30-	30 A	-	Auxiliary heater control unit -J364- applicable from November 2010	30
F31	-	Fuse 31 on fuse holder B -SB31-	30 A	-	Wiper motor control unit -J400-	30
F32	-	Not assigned	-	-
F33	-	Not assigned	-	-
F34	-	Not assigned	-	-
F35	-	Not assigned	-	-
F36	-	Not assigned	-	-
F37	-	Not assigned	-	-
F38	-	Fuse 38 on fuse holder B -SB38-	10 A	-	Radiator​ fan​ control​ unit -J293- (BPY, BWA, BHZ, BUB, CDLA, CDLC, CBRA, BZC, CEPA, CEPB) Activated​ charcoal​ filter​ system​ solenoid​ valve​ 1 -N80- (BUB, CBRA) Secondary​ air​ inlet​ valve -N112- (BUB, CBRA) Variable intake manifold change-over​ valve -N156- (BUB, CBRA) Inlet​ camshaft​ control​ valve​ 1 -N205- (BPY, BWA, BHZ, BUB, CDLA, CDLC, CBRA, BZC) Exhaust​ camshaft​ control​ valve​ 1 -N318- (BUB, CBRA) Secondary​​ air​​ inlet​​ valve 2 -N320- (BUB, CBRA) Fuel​ system​ diagnostic​ pump -V144- (BUB, CBRA)	87
F39	-	Fuse 39 on fuse holder B -SB39-	5 A	-	Clutch position sender -G476-	87
F39	-	Fuse 39 on fuse holder B -SB39-	5 A	-	Brake light switch -F- Brake pedal switch -F63- applicable from model year 2010	87
F40	-	Fuse 40 on fuse holder B -SB40-	20 A	-	Ignition coil 1 with output stage -N70- Ignition coil 2 with output stage -N127- Ignition coil 3 with output stage -N291- Ignition coil 4 with output stage -N292- for models with engine codes BPY, BWA, BHZ, CDLA, CDLC, BZC only	87
F40	-	Fuse 40 on fuse holder B -SB40-	15 A	-	Engine control unit -J623- for models with engine code CEPA, CEPB only	87
F41	-	Not assigned	-	-
F42	-	Fuse 42 on fuse holder B -SB42-	5 A	-	Engine component current supply relay -J757- for models with engine codes BPY, BWA, BHZ, CDLA, CDLC, BZC, CEPA, CEPB only	87
F43	-	Fuse 43 on fuse holder B -SB43-	30 A	-	Ignition​ coil​ 1​ with​ output​ stage -N70- (BUB, CBRA, CEPA, CEPB) Ignition​ coil​ 2​ with​ output​ stage -N127- (BUB, CBRA, CEPA, CEPB) Ignition​ coil​ 3​ with​ output​ stage -N291- (BUB, CBRA, CEPA, CEPB) Ignition​ coil​ 4​ with​ output​ stage -N292- (BUB, CBRA, CEPA, CEPB) Ignition​ coil​ 5​ with​ output​ stage -N323- (BUB, CBRA, CEPA, CEPB) Igntion coil 6 with output stage -N324- (BUB, CBRA)	87
F44	-	Not assigned	-	-
F45	-	Not assigned	-	-
F46	-	Not assigned	-	-
F47	-	Fuse 47 on fuse holder B -SB47-	30 A	-	Onboard supply control unit -J519- Left side light supply, left main beam, left dipped beam, left turn signal, left fog light	30
F48	-	Fuse 48 on fuse holder B -SB48-	40 A	-	ABS control unit -J104- (MK60 ESP pump) ABS control unit -J104- (MK70 ABS pump and ABS valves) applicable from model year 2009	30
F48	-	Fuse 48 on fuse holder B -SB48-	30 A	-	Onboard supply control unit -J519- Right side light supply, right main beam, right dipped beam, right turn signal, right fog light is dropped from model year 2009	30
F49	-	Fuse 49 on fuse holder B -SB49-	40 A	-	Terminal 15 voltage supply relay 2 -J681- Supply for the fuses: -SC1- up to -SC6-, -SC29- up to -SC31-, -SC46-, -SC47-, -SC49- is dropped from model year 2009	30
F50	-	Not assigned	-	-
F51	-	Fuse 51 on fuse holder B -SB51-	40 A	-	Secondary​ air​ pump​ motor​ -V101- (BUB, CBRA)	30
F52	-	Fuse 52 on fuse holder B -SB52-	50 A	-	Terminal 15 voltage supply relay 2 -J681- Supply for the fuses: -SC1- up to -SC6-, -SC19-, -SC20-, -SC29- up to -SC31-, -SC40-, -SC41-, -SC42-, -SC46-, -SC47-, -SC49- applicable from model year 2009	30
F52	-	Fuse 52 on fuse holder B -SB52-	50 A	-	X-contact relief relay -J59- Supply for the fuses: -SC40-, -SC41-, -SC42- is dropped from model year 2009	30
F53	-	Fuse 53 on fuse holder B -SB53-	50 A	-	B300 Positive connection 4 (30), in main wiring harness Supply for the fuses: -SC32- up to -SC37-, -SC44-, -SC45-, -SC48-, -S131- for models with battery in engine compartment only is dropped from model year 2009	30
F53	-	Fuse 53 on fuse holder B -SB53-	50 A	-	B300 Positive connection 4 (30), in main wiring harness Supply for the fuses: -SC32- up to -SC37-, -SC48-, -S131- for models with battery in luggage compartment only is dropped from model year 2009	30
F53	-	Fuse 53 on fuse holder B -SB53-	50 A	-	B300 Positive connection 4 (30), in main wiring harness Supply for the fuses: -SC32- up to -SC37-, -SC39-, -SC44-, -SC45-, -SC48-, -S131- for models with battery in engine compartment only applicable from model year 2009	30
F53	-	Fuse 53 on fuse holder B -SB53-	50 A	-	B300 Positive connection 4 (30), in main wiring harness Supply for the fuses: -SC32- up to -SC37-, -SC39-, -SC48-, -S131- for models with battery in luggage compartment only applicable from model year 2009	30

AUDI A3 2008 Location fuse holder C SC , under left dash panel

Location fuse holder C -SC-, under left dash panel

Fuse colours

50A - red

40A - orange

30A - light-green

25A - natural (white)

20 A - yellow

15A - light blue

10A - red

7.5A - brown

5A - light-brown

3 A - purple

AUDI A3 2008 Position of fuses, fuse holder, from model year 2004

Position of fuses, fuse holder, from model year 2004

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
1	-	Fuse 1 on fuse holder C -SC1-	10 A	-	16-pin connector -T16- (diagnostic connector) Lighting switch -E1-	15
2	-	Fuse 2 on fuse holder C -SC2-	5 A	-	ABS control unit -J104- TCS and ESP button -E256-	15
3	-	Fuse 3 on fuse holder C -SC3-	10 A	-	Power steering control unit -J500-	15
4	-	Fuse 4 on fuse holder C -SC4-	10 A	-	Heater​ control​ unit -J65-1 Air quality sensor -G238- High-pressure sender -G65-	15
5	-	Fuse 5 on fuse holder C -SC5-	5 A	-	Airbag​ control​ unit​ -J234- Seat occupied recognition control unit -J706- applicable from model year 2005	15
5	-	Fuse 5 on fuse holder C -SC5-	5 A	-	Clutch​ position​ sender -G476-1 Brake light switch -F-1 Brake​ pedal​ switch -F63-1 is dropped from April 2003	15
6	-	Fuse 6 on fuse holder C -SC6-	5 A	-	Data bus diagnostic interface -J533- Function​ selection​ switch​ 2 -E272-1 Trailer​ detector​ control​ unit -J345-	15
7	-	Fuse 7 on fuse holder C -SC7-	5 A	-	Heater​ control​ unit -J65-1 Headlight range control unit -J431- Heated rear left seat switch with regulator -E128- Heated rear right seat switch with regulator -E129-	15
8	-	Fuse 8 on fuse holder C -SC8-	10 A	-	Garage door operating unit -E284- Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401-1 Parking aid control unit -J446- Garage door operation control unit -J530- Automatic anti-dazzle interior mirror -Y7-	15
9	-	Fuse 9 on fuse holder C -SC9-	5 A	-	All-wheel drive control unit -J492-	15
10	-	Fuse 10 on fuse holder C -SC10-	5 A	-	Selector​ lever -E313- Tiptronic​ switch -F189-1	15
11	-	Fuse 11 on fuse holder C -SC11-	10 A	-	Trailer​ socket​ -U10-1	15
12	-	Fuse 12 on fuse holder C -SC12-	10 A	-	Driver door control unit -J386- Front passenger door control unit -J387-	30
13	-	Fuse 13 on fuse holder C -SC13-	10 A	-	Brake light switch -F- 16-pin connector -T16- (diagnostic connector)	30
14	-	Fuse 14 on fuse holder C -SC14-	5 A	-	Automatic​​ gearbox​​ control​​ unit -J217-1	30
15	-	Fuse 15 on fuse holder C -SC15-	10 A	-	Onboard supply control unit -J519-	30
16	-	Fuse 16 on fuse holder C -SC16-	10 A	-	Rain and light sensor -G397- Heater​ control​ unit -J65-1 Climatronic control unit -J255- Remote​ control​ receiver​ for​ auxiliary​ heater -R64-1	30
17	-	Fuse 17 on fuse holder C -SC17-	5 A	-	Convenience system central control unit -J393-	30
18	-	Fuse 18 on fuse holder C -SC18-	5 A	-	Selector​ lever -E313- Tiptronic​ switch -F189-1 Parking​ aid​ control​ unit -J446-1 ABS control unit -J104-	30
19	-	Fuse 19 on fuse holder C -SC19-	10 A	-	Rear left door control unit -J388- Rear right door control unit -J389-	30
20	-	Not assigned	-	-		-
21	-	Not assigned	-	-		-
22	-	Fuse 22 on fuse holder C -SC22-	40 A	-	Fresh air blower control unit -J126-	30
23	-	Fuse 23 on fuse holder C -SC23-	20 A	-	Headlight washer system relay -J39- Headlight​ washer​ system​ pump -V11- is dropped, from model year 2005	30
24	-	Fuse 24 on fuse holder C -SC24-	20 A	-	Cigarette lighter -U1- 12V socket -U5-	30
25	-	Fuse 25 on fuse holder C -SC25-	30 A	-	Heated rear window -Z1-	30
26	-	Fuse 26 on fuse holder C -SC26-	20 A	-	Socket -U-	30
27	-	Fuse 27 on fuse holder C -SC27-	15 A	-	Fuel pump relay -J17-1 Electric​ fuel​ pump​ 2​ relay -J49-1 Fuel pump control unit -J538-	30
28	-	Not assigned	-	-		-
29	-	Fuse 29 on fuse holder C -SC29-	10 A	-	Motronic control unit -J220- Diesel​ direct​ injection​ system​ control​ unit​ -J248-1 Simos​ control​ unit​ -J361-1 Fuel pump control unit -J538- Front passenger side airbag deactivated warning lamp -K145-	15
30	-	Not assigned	-	-		-
31	-	Fuse 31 on fuse holder C -SC31-	5 A	-	Reversing light switch -F4- Mechatronic unit for dual clutch gearbox -J743-	15
32	-	Not assigned	-	-
33	-	Fuse 33 on fuse holder C -SC33-	25 A	-	Sliding sunroof control unit -J245-	15
34		Fuse 34 on fuse holder C -SC34-	20 A		Heated​ rear​ left​ seat​ control​ unit -J215-1 Heated​ rear​ right​ seat​ control​ unit -J216-1	30
35	-	Fuse 35 on fuse holder C -SC35-	5 A	-	Interior monitoring sensor -G273- Vehicle inclination sender -G384- Alarm horn -H12-	30
36	-	Fuse 36 on fuse holder C -SC36-	10 A	-	Driver seat lumbar support adjustment switch -E176- Front passenger seat lumbar support adjustment switch -E177-	30
37	-	Fuse 37 on fuse holder C -SC37-	20 A	-	Climatronic control unit -J255- Driver​ seat​ heating​ control​ unit -J726-1 Front passenger seat heating control unit -J727-1	30
38	-	Not assigned	-	-		-
39	-	Not assigned	-	-		-
40	-	Fuse 40 on fuse holder C -SC40-	40 A	-	Fresh air blower switch -E9-1 for models without air conditioning system only	75
41	-	Fuse 41 on fuse holder C -SC41-	15 A	-	Rear window wiper motor -V12-	75
42	-	Fuse 42 on fuse holder C -SC42-	15 A	-	Windscreen​ and​ rear​ window​ washer​ pump -V59-	75
43	-	Not assigned	-	-
44	-	Fuse 44 on fuse holder C -SC44-	20 A	-	Trailer​​ detector​​ control​​ unit -J345-1 Supply for turn signal, brake light, left tail light	30
45	-	Fuse 45 on fuse holder C -SC45-	15 A	-	Trailer​​ detector​​ control​​ unit -J345-1 Supply for rear fog light, reversing light, right tail light	30
46	-	Fuse 46 on fuse holder C -SC46-	5 A	-	Heater​ control​ unit -J65-1 Climatronic control unit -J255- Left​ washer​ jet​ heater​ element -Z20- Right washer​ jet​ heater​ element -Z21-	75
47	-	Not assigned	-	-		-
48	-	Fuse 48 on fuse holder C -SC48-	10 A	-	Option driving school vehicle	30
49	-	Fuse 49 on fuse holder C -SC49-	10 A	-	Option driving school vehicle	15
49	-	Fuse 49 on fuse holder C -SC49-	5 A	-	Option police	15

1 not for models with US equipment

AUDI A3 2008 Position of fuses, fuse holder, from model year 2006

Position of fuses, fuse holder, from model year 2006

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
1	-	Fuse 1 on fuse holder C -SC1-	10 A	-	Lighting switch -E1- Fuel pump relay -J17- Engine control unit -J623-1 Motronic control unit -J220- Diesel​ direct​ injection​ system​ control​ unit​ -J248-1 Fuel pump control unit -J538- 16-pin connector -T16- (diagnostic connector)	15
2	-	Fuse 2 on fuse holder C -SC2-	5 A	-	ABS control unit -J104- Brake light switch -F- Brake pedal switch -F63-	15
3	-	Fuse 3 on fuse holder C -SC3-	5 A	-	Airbag​ control​ unit​ -J234- Front passenger side airbag deactivated warning lamp -K145-	15
4	-	Fuse 4 on fuse holder C -SC4-	5 A	-	Tyre​ pressure​ monitor​ button -E226-1 TCS and ESP button -E256- Reversing light switch -F4- High-pressure sender -G65- Air quality sensor -G238- Oil level and oil temperature sender -G266- Heater​​ control​​ unit -J162-1 Heated​ rear​ left​ seat​ control​ unit -J215-1 Heated​ rear​ right​ seat​ control​ unit -J216-1 Driver​ seat​ heating​ control​ unit -J726-1 Front passenger seat heating control unit -J727-1	15
5	-	Fuse 5 on fuse holder C -SC5-	5 A	-	Headlight range control unit -J431-	15
			10 A	-	Headlight​ range​ control​ regulator -E102-1 Left​ headlight​ range​ control​ motor -V48-1 Right​ headlight​ range​ control​ motor -V49-1	15
6	-	Fuse 6 on fuse holder C -SC6-	5 A	-	Function​ selection​ switch​ 2 -E272-1 Selector​ lever -E313- Tiptronic​ switch -F189-1 Power steering control unit -J500- Data bus diagnostic interface -J533- Mechatronic unit for dual clutch gearbox -J743-	15
7	-	Fuse 7 on fuse holder C -SC7-	5 A	-	Garage door operating unit -E284- Trailer​​ detector​​ control​​ unit -J345-1 Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401-1 Navigation operating electronics control unit -J402- Parking​ aid​ control​ unit -J446-1 Garage door operation control unit -J530- Automatic anti-dazzle interior mirror -Y7-	15
8	-	Fuse 8 on fuse holder C -SC8-	10 A	-	Trailer​ socket​ -U10-1	15
9	-	Not assigned	-	-		-
10	-	Fuse 10 on fuse holder C -SC10-	5 A	-	Seat occupied recognition control unit -J706-	15
11	-	Fuse 11 on fuse holder C -SC11-	5 A	-	Power​ output​ module​ for​ right​ headlight -J668-	15
12	-	Fuse 12 on fuse holder C -SC12-	10 A	-	Driver door control unit -J386- Front passenger door control unit -J387-	30
13	-	Fuse 13 on fuse holder C -SC13-	10 A	-	Brake​ light​ switch -F- (Bremsleuchten) 16-pin connector -T16- (diagnostic connector)	30
14	-	Fuse 14 on fuse holder C -SC14-	5 A	-	Automatic​​ gearbox​​ control​​ unit -J217-1	30
15	-	Fuse 15 on fuse holder C -SC15-	10 A	-	Onboard supply control unit -J519-	30
16	-	Fuse 16 on fuse holder C -SC16-	10 A	-	Rain and light sensor -G397- Heater​​ control​​ unit -J162-1 Climatronic control unit -J255- Remote​ control​ receiver​ for​ auxiliary​ heater -R64-1	30
17	-	Fuse 17 on fuse holder C -SC17-	5 A	-	Convenience system central control unit -J393-	30
18	-	Fuse 18 on fuse holder C -SC18-	5 A	-	Selector​ lever -E313- Tiptronic​ switch -F189-1 Parking​ aid​ control​ unit -J446-1	30
19	-	Fuse 19 on fuse holder C -SC19-	10 A	-	Rear left door control unit -J388- Rear right door control unit -J389-	30
20	-	Fuse 20 on fuse holder C -SC20-	5 A	-	ABS​ control​ unit -J104-1	30
21	-	Not assigned	-	-		-
22	-	Fuse 22 on fuse holder C -SC22-	40 A	-	Fresh air blower control unit -J126-	30
23	-	Fuse 23 on fuse holder C -SC23-	30 A	-	Driver side window regulator motor -V147-	30
24	-	Fuse 24 on fuse holder C -SC24-	20 A	-	Cigarette lighter -U1- 12V socket -U5-	30
25	-	Fuse 25 on fuse holder C -SC25-	30 A	-	Heated rear window -Z1-	30
26	-	Fuse 26 on fuse holder C -SC26-	20 A	-	Socket -U-	30
27	-	Fuse 27 on fuse holder C -SC27-	15 A	-	Electric fuel pump 2 relay -J49- Fuel pump control unit -J538-	30
28	-	Fuse 28 on fuse holder C -SC28-	30 A	-	Rear left window regulator motor -V26- Rear right window regulator motor -V27-	30
29	-	Fuse 29 on fuse holder C -SC29-	10 A	-	Air mass meter -G70- Crankcase breather heater element -N79-	15
30	-	Fuse 30 on fuse holder C -SC30-	10 A	-	Injector,​ cylinder​ 1 -N30- Injector,​ cylinder​ 2 -N31- Injector,​ cylinder​ 3 -N32- Injector,​ cylinder​ 4 -N33- Injector,​ cylinder​ 5 -N83- Injector,​ cylinder​ 6 -N84-	15
31	-	Fuse 31 on fuse holder C -SC31-	5 A	-	All-wheel drive control unit -J492-	15
			20 A	-	Vacuum​ pump​ relay -J57-1	15
32	-	Fuse 32 on fuse holder C -SC32-	30 A	-	Headlight​ washer​ system​ pump -V11- Headlight washer system relay -J39-	30
33	-	Fuse 33 on fuse holder C -SC33-	25 A	-	Sliding sunroof control unit -J245-	30
34	-	Fuse 34 on fuse holder C -SC34-	20 A	-	Heated​ rear​ left​ seat​ control​ unit -J215-1 Heated​ rear​ right​ seat​ control​ unit -J216-1	30
35	-	Fuse 35 on fuse holder C -SC35-	5 A	-	Interior monitoring sensor -G273- Vehicle inclination sender -G384- Alarm horn -H12-	30
36	-	Fuse 36 on fuse holder C -SC36-	10 A	-	Driver seat lumbar support adjustment switch -E176- Front passenger seat lumbar support adjustment switch -E177-	30
37	-	Fuse 37 on fuse holder C -SC37-	20 A	-	Climatronic control unit -J255- Driver​ seat​ heating​ control​ unit -J726-1 Front passenger seat heating control unit -J727-1 Front left seat heating -Z45- Front right seat heating -Z46-	30
38	-	Fuse 38 on fuse holder C -SC38-	30 A	-	Front passenger side window regulator motor -V148-	30
39	-	Fuse 39 on fuse holder C -SC39-	20 A	-	Multifunction switch -F125-1 Automatic​​ gearbox​​ control​​ unit -J217-1	15
40	-	Fuse 40 on fuse holder C -SC40-		-	Fresh air blower switch -E9-1 for models without air conditioning system only	75
41	-	Fuse 41 on fuse holder C -SC41-	15 A	-	Rear window wiper motor -V12-	75
42	-	Fuse 42 on fuse holder C -SC42-	15 A	-	Windscreen​ and​ rear​ window​ washer​ pump -V59-	75
43	-	Not assigned	-	-
44	-	Fuse 44 on fuse holder C -SC44-	20 A	-	Trailer​​ detector​​ control​​ unit -J345-1	30
45	-	Fuse 45 on fuse holder C -SC45-	15 A	-	Trailer​​ detector​​ control​​ unit -J345-1	30
46	-	Fuse 46 on fuse holder C -SC46-	5 A	-	Heater​​ control​​ unit -J162-1 Climatronic control unit -J255- Left​ washer​ jet​ heater​ element -Z20- Right washer​ jet​ heater​ element -Z21-	75
47	-	Fuse 47 on fuse holder C -SC47-	5 A	-	Power output module for left headlight -J667-	15
48	-	Fuse 48 on fuse holder C -SC48-	10 A	-	Socket -U-1 for driving school only	30
49	-	Fuse 49 on fuse holder C -SC49-	5 A	-	Special​ vehicle​ fuse​ 6 -S296-1 Footwell​ light​ switch -E295-1 Warning​ buzzer​ switch -E296-1	15

1 not for models with US equipment

AUDI A3 2008 Position of fuses, fuse holder, from model year 2007

Position of fuses, fuse holder, from model year 2007

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
1	-	Fuse 1 on fuse holder C -SC1-	10 A	-	Lighting switch -E1- Headlight​ range​ control​ regulator -E102-1 Air mass meter -G70- (BKC, BXE, AZV, BKD, BLS, BMM, BMN, BPU, BPT, BYZ, BWA, BPY, BHZ, BZB, CAWB, CBFA, BUY, CDAA, CCZA, CCTA, CDLA, CDLC, CAYB, CAYC, BZC, CBEA) Trailer​​ detector​​ control​​ unit -J345-1 Headlight range control unit -J431- Heater​ element​ for​ crankcase​ breather -N79- (BSE, BSF, BKC, BXE, AZV, BKD, BLS, BMM, BMN, BUB, BUY, CCSA, CBBB, CBAB, CBAA, CBRA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CMXA, CLJA) 16-pin connector -T16- (diagnostic connector) Left​ headlight​ range​ control​ motor -V48-1 Right​ headlight​ range​ control​ motor -V49-1	15
1	-	Fuse 1 on fuse holder C -SC1-	10 A	-	Air​ mass​ meter​ -G70- (CBBB, CBAB, CBAA) only models without stop/start system applicable from model year 2010	15
1	-	Fuse 1 on fuse holder C -SC1-	10 A	-	Stop/start​ system​ button​ -E693- only models with stop/start system no longer fitted, phased from model year 2010	15
2	-	Fuse 2 on fuse holder C -SC2-	10 A	-	Engine control units -J...- Fuel pump relay -J17- (BSE, BSF, BUB, CCSA, CBRA, CMXA) ABS control unit -J104- Current​ supply​ relay​ for​ Simos​ control​ unit​ -J363- (BSE, BSF, CCSA, CMXA) 1 Power steering control unit -J500- Data bus diagnostic interface -J533- Fuel pump control unit -J538- (BPU, BYT, BPT, BLF, BVY, BVZ, BPY, BWA, BHZ, CMSA, CAXC, BZB, CAWB, CBFA, CDAA, CCZA, CCTA, CDLC, CDLA, BZC) Selector lever sensors control unit -J587- Mechatronic unit for dual clutch gearbox -J743-	15
2	-	Fuse 2 on fuse holder C -SC2-	10 A	-	Brake light switch -F- Brake pedal switch -F63- is dropped from model year 2010	15
2	-	Fuse 2 on fuse holder C -SC2-	10 A	-	Tiptronic​ switch -F189-1 All-wheel drive control unit -J492- is dropped from model year 2009	15
2	-	Fuse 2 on fuse holder C -SC2-	10 A	-	Starter relay 1 -J906- Starter relay 2 -J907- Automatic​ anti-dazzle​ interior​ mirror​ relay​ -J910- only models with stop/start system applicable from model year 2010	15
3	-	Fuse 3 on fuse holder C -SC3-	5 A	-	Airbag​ control​ unit​ -J234- Front passenger side airbag deactivated warning lamp -K145-	15
4	-	Fuse 4 on fuse holder C -SC4-	5 A	-	Heated​ rear​ left​ seat​ switch​ with​ regulator -E128-1 Heated​ rear​ right​ seat​ switch​ with​ regulator -E129-1 Tyre​ pressure​ monitor​ button -E226-1 TCS and ESP button -E256- Garage door operating unit -E284- Reversing light switch -F4- High-pressure sender -G65- Air quality sensor -G238- Oil level and oil temperature sender -G266- Heater control unit -J162- Climatronic control unit -J255- Air​​ conditioning​​ system​​ control​​ unit -J301-1 Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401-1 Parking aid control unit -J446- Garage door operation control unit -J530- Seat occupied recognition control unit -J706- Driver​ seat​ heating​ control​ unit -J726-1 Front passenger seat heating control unit -J727-1 Left​ washer​ jet​ heater​ element -Z20- Right washer​ jet​ heater​ element -Z21-	15
4	-	Fuse 4 on fuse holder C -SC4-	5 A	-	Automatic anti-dazzle interior mirror -Y7- is dropped from model year 2010	15
4	-	Fuse 4 on fuse holder C -SC4-	5 A	-	Automatic anti-dazzle interior mirror -Y7- only models without stop/start system applicable from model year 2010	15
4	-	Fuse 4 on fuse holder C -SC4-	5 A	-	Voltage stabiliser -J532- only models with stop/start system applicable from model year 2010	15
4	-	Fuse 4 on fuse holder C -SC4-	5 A	-	Stop/start​ system​ button​ -E693- only models with stop/start system Gradual introduction during model year 2010	15
5	-	Fuse 5 on fuse holder C -SC5-	5 A	-	Power output module for left headlight -J667-	15
6	-	Fuse 6 on fuse holder C -SC6-	5 A	-	Power​ output​ module​ for​ right​ headlight -J668-	15
7	-	Not assigned	-	-		-
8	-	Fuse 8 on fuse holder C -SC8-	5 A	-	Control unit in dash panel insert -J285- applicable from model year 2010	30
9	-	Fuse 9 on fuse holder C -SC9-	15 A	-	Navigation operating electronics control unit -J402- Control​ unit​ with​ display​ for​ radio​ and​ navigation system -J503- Radio -R- 8-pin connector -T8- (preparation for radio supply) 1 applicable from model year 2010	30
10	-	Fuse 10 on fuse holder C -SC10-	7.5 A	-	Navigation system tuner for TV -J415-1 Telephone transmitter and receiver unit -R36- Satellite radio -R146-2 Connection for external audio sources -R199- 18-pin connector -T18a- (VDA interface) 1 applicable from model year 2010	30
11	-	Fuse 11 on fuse holder C -SC11-	10 A	-	Automatic​ anti-dazzle​ interior​ mirror​ relay​ -J910- Automatic anti-dazzle interior mirror -Y7- only models with stop/start system applicable from model year 2010	30
12	-	Fuse 12 on fuse holder C -SC12-	10 A	-	Driver door control unit -J386- Front passenger door control unit -J387-	30
13	-	Fuse 13 on fuse holder C -SC13-	10 A	-	Rear left door control unit -J388- Rear right door control unit -J389-	30
13	-	Fuse 13 on fuse holder C -SC13-	10 A	-	Convenience system central control unit -J393- is dropped from model year 2010	30
14	-	Fuse 14 on fuse holder C -SC14-	10 A	-	ABS control unit -J104- Selector lever sensors control unit -J587-	30
14	-	Fuse 14 on fuse holder C -SC14-	10 A	-	Tiptronic​ switch -F189-1 Automatic​​ gearbox​​ control​​ unit -J217-1 Parking aid control unit -J446- is dropped from model year 2009	30
15	-	Fuse 15 on fuse holder C -SC15-	10 A	-	Front interior light -W- Front interior light -W1- Rear interior light -W43-	30
16	-	Fuse 16 on fuse holder C -SC16-	10 A	-	Rain and light sensor -G397- Heater control unit -J162- Climatronic control unit -J255- Air​​ conditioning​​ system​​ control​​ unit -J301-1 Tyre​ pressure​ monitor​ control​ unit -J502-2 Remote​ control​ receiver​ for​ auxiliary​ heater -R64-1 16-pin connector -T16- (diagnostic connector)	30
16	-	Fuse 16 on fuse holder C -SC16-	10 A	-	Lighting switch -E1- applicable from model year 2010	30
17	-	Fuse 17 on fuse holder C -SC17-	5 A	-	Interior​ monitoring​ sensor -G273-1 Vehicle​ inclination​ sender -G384-1 Alarm horn -H12-	30
18	-	Fuse 18 on fuse holder C -SC18-	5 A	-	Engine control unit -J623- (diagnostic cable) for models with engine code CBFA only is dropped from model year 2010	50
18	-	Fuse 18 on fuse holder C -SC18-	5 A	-	Onboard supply control unit -J519- (diagnostic cable) Voltage stabiliser -J532- (diagnosis wiring) Engine control unit -J623- (diagnostic cable) only models with stop/start system applicable from model year 2010	50
18	-	Fuse 18 on fuse holder C -SC18-	5 A	-	Onboard supply control unit -J519- (diagnostic cable) Engine control unit -J623- (diagnostic cable) for models with engine code CBFA only applicable from model year 2010	50
19	-	Fuse 19 on fuse holder C -SC19-	10 A	-	All-wheel drive control unit -J492- applicable from model year 2009	15
20	-	Fuse 20 on fuse holder C -SC20-	5 A	-	Electronically controlled damping control unit -J 250- applicable from model year 2009	15
21	-	Not assigned	-	-		-
22	-	Fuse 22 on fuse holder C -SC22-	40 A	-	Fresh air blower control unit -J126- Fresh air blower -V2-	30
23	-	Fuse 23 on fuse holder C -SC23-	30 A	-	Driver side window regulator motor -V147-	30
24	-	Fuse 24 on fuse holder C -SC24-	20 A	-	Cigarette lighter -U1-	30
25	-	Fuse 25 on fuse holder C -SC25-	30 A	-	Heated rear window -Z1-	30
26	-	Fuse 26 on fuse holder C -SC26-	20 A	-	Socket -U-	30
27	-	Fuse 27 on fuse holder C -SC27-	15 A	-	Fuel pump relay -J17- (BSE, BSF, CCSA, CBBB, CBAB, CBAA, BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CMXA, CLJA) Fuel pump control unit -J538- (BPU, BYT, BPT, BWA, BPY, BHZ, CMSA, CAXC, BZB, CAWB, CCTA, CBFA, BLF, BVY, BVZ, CDAA, CCZA, CDLA, CDLC, BZC, CBZB)	30
27	-	Fuse 27 on fuse holder C -SC27-	15 A	-	Electric fuel pump 2 relay -J49- (BSE, BSF, BUB, CCSA, CBRA, CMXA) applicable from November 2006, for models with auxiliary heating only, models with engine codes BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CBBB, CBAB, CBAA, CAYB, CAYC, CFFA,​·CFFB,​·CFGB,​·CLJA	30
27	-	Fuse 27 on fuse holder C -SC27-	15 A	-	Supplementary fuel pump relay -J832- (CBBB, CBAB, CBAA, CBEA, CFFA, CFFB, CFGB, CLJA) Supplementary fuel pump -V393- (CBBB, CBAB, CBAA, CBEA, CFFA, CFFB, CFGB, CLJA)	30
28	-	Fuse 28 on fuse holder C -SC28-	30 A	-	Rear left window regulator motor -V26- Rear right window regulator motor -V27-	30
29	-	Not assigned	-	-		-
30	-	Fuse 30 on fuse holder C -SC30-	20 A	-	Multifunction switch -F125-1 Automatic​​ gearbox​​ control​​ unit -J217-1 is dropped from model year 2009	15
31	-	Fuse 31 on fuse holder C -SC31-	20 A	-	Vacuum​ pump​ for​ brakes -V192- (CCSA, BSE, BSF, CMXA) 1	15
32	-	Fuse 32 on fuse holder C -SC32-	30 A	-	Headlight​ washer​ system​ pump -V11-	30
33	-	Fuse 33 on fuse holder C -SC33-	20 A	-	Sliding sunroof control unit -J245-	30
34	-	Fuse 34 on fuse holder C -SC34-	20 A	-	Heated​ rear​ left​ seat​ control​ unit -J215-1 Heated​ rear​ right​ seat​ control​ unit -J216-1	30
35	-	Not assigned	-	-
36	-	Fuse 36 on fuse holder C -SC36-	10 A	-	Driver seat lumbar support adjustment switch -E176- Front passenger seat lumbar support adjustment switch -E177-	30
37	-	Fuse 37 on fuse holder C -SC37-	20 A	-	Climatronic control unit -J255- Driver​ seat​ heating​ control​ unit -J726-1 Front passenger seat heating control unit -J727-1	30
38	-	Fuse 38 on fuse holder C -SC38-	30 A	-	Front passenger side window regulator motor -V148-	30
39	-	Fuse 39 on fuse holder C -SC39-	5 A	-	Interface​ control​ unit​ for​ vehicle​ location​ system -J843- (interface for special functions)	30
39	-	Fuse 39 on fuse holder C -SC39-	25 A	-	Control​ unit​ with​ display​ for​ radio​ and​ navigation -J503-1 with radio navigation system (models for Japan) only applicable from model year 2010	30
40	-	Fuse 40 on fuse holder C -SC40-	40 A	-	Starter -B- applicable from model year 2009	15
40	-	Fuse 40 on fuse holder C -SC40-	40 A	-	Fresh air blower switch -E9-1 Fresh air blower -V2-1 is dropped from model year 2009	75
41	-	Fuse 41 on fuse holder C -SC41-	15 A	-	Rear window wiper motor -V12- applicable from model year 2009	15
41	-	Fuse 41 on fuse holder C -SC41-	15 A	-	Rear window wiper motor -V12- is dropped from model year 2009	75
42	-	Fuse 42 on fuse holder C -SC42-	15 A	-	Windscreen​ and​ rear​ window​ washer​ pump -V59- is dropped from model year 2009	75
42	-	Fuse 42 on fuse holder C -SC42-	15 A	-	Windscreen​ and​ rear​ window​ washer​ pump -V59- applicable from model year 2009 is dropped from model year 2010	15
43	-	Fuse 43 on fuse holder C -SC43-	20 A	-	Convenience system central control unit -J393- is dropped from model year 2010	30
43	-	Fuse 43 on fuse holder C -SC43-	20 A	-	Onboard supply control unit -J519- applicable from model year 2010	30
44	-	Fuse 44 on fuse holder C -SC44-	20 A	-	Trailer​​ detector​​ control​​ unit -J345-1	30
45	-	Fuse 45 on fuse holder C -SC45-	15 A	-	Trailer​​ detector​​ control​​ unit -J345-1 is dropped from November 2006	30
45	-	Fuse 45 on fuse holder C -SC45-	20 A	-	Trailer​​ detector​​ control​​ unit -J345-1 applicable from November 2006	30
46	-	Fuse 46 on fuse holder C -SC46-	10 A	-	Trailer​ socket​ -U10-1	15
47	-	Fuse 47 on fuse holder C -SC47-	5 A	-	18-pin connector -T18a- (VDA interface) 1	15
47	-	Fuse 47 on fuse holder C -SC47-	5 A	-	Aerial​ amplifier​ for​ mobile​ telephone -R86-1 applicable from model year 2010	15
48	-	Fuse 48 on fuse holder C -SC48-	10 A	-	Socket -U- (driving school vehicle) 1	30
49	-	Fuse 49 on fuse holder C -SC49-	5 A	-	Buzzer and gong -H3- (driving school vehicle) 1 Special vehicle fuse 6 -S296- (German special police, doctor on call vehicle) 1 Driving school footwell lamp -W56-1	15

1 not for models with US equipment 2 only models with USA equipment

AUDI A3 2008 Main fuse box: Location, fuse holder D SD at rear right in luggage compartment

Main fuse box: Location, fuse holder D -SD- at rear right in luggage compartment

Fuse assignment:

Position of fuses on main fuse box, from model year 2004

Position of fuses on main fuse box, from model year 2006

AUDI A3 2008 Position of fuses, main fuse box, from model year 2004

Position of fuses, main fuse box, from model year 2004

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
1	-	Fuse 1 on fuse holder D -SD1-	5 A	-	Onboard supply control unit -J519-	30
2	-	Fuse​ 2​ on​ fuse​ holder​ D​ -SD2-	125 A	-	Supply for main fuse box, electronics box, relay and fuse carrier, electronics box	30
3	-	Fuse​ 3​ on​ fuse​ holder​ D -SD3-	80 A	-	Supply for main fuse box, electronics box, relay and fuse carrier, electronics box	30
4	-	Fuse​ 4​ on​ fuse​ holder​ D -SD4-	30 A	-	Amplifier -R12- for models with Bose sound system only	30

AUDI A3 2008 Position of fuses, main fuse box, from model year 2006

Position of fuses, main fuse box, from model year 2006

No.		Current Flow Diagram designation	Nominal value		Function/component	Terminal
1	-	Fuse 1 on fuse holder D -SD1-	5 A	-	Onboard supply control unit -J519-	30
2	-	Fuse​ 2​ on​ fuse​ holder​ D​ -SD2-	125 A	-	Supply for main fuse box, electronics box high, relay and fuse carrier, electronics box high	30
3	-	Fuse​ 3​ on​ fuse​ holder​ D -SD3-	80 A	-	Supply for main fuse box, electronics box high, relay and fuse carrier, electronics box high	30
4	-	Fuse​ 4​ on​ fuse​ holder​ D -SD4-	30 A	-	Amplifier -R12- for models with Bose sound system only is dropped from November 2005	30
			50 A	-	Option doctor is dropped from November 2005
4	-	Fuse​ 4​ on​ fuse​ holder​ D -SD4-	30 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC19- applicable from November 2005	30
4	-	Fuse​ 4​ on​ fuse​ holder​ D -SD4-	30 A	-	Supply for the fuses: -SC12- up to -SC17-, -SC43- applicable from May 2006	30

AUDI A3 2008 Fuses on left under dash panel

Fuses on left under dash panel

Position of fuses, from model year 2004

B -	Window regulator single fuse -S37- - 30 A

Position of fuses, from model year 2005

A -	Window​ regulator​ single​ fuse​ 2 -S280- - 30 A

B -	Window regulator single fuse -S37- - 30 A

C -	Fuse 1 -S131- - 30 A

Position of fuses, from model year 2006

C -	Fuse 1 -S131- - 30 A

q	For left-hand drive models only

q	For right-hand drive models only, is dropped, from​ model​ year​ 2012

D -	Fuse 1 -S131- - 30 A

q	For right-hand drive models only, phased in in model year 2012

AUDI A3 2008 Overview of control units

Overview of control units

q	Connector assignment

2 -

q	Connector assignment for dual clutch gearbox (02E)

q	Location for dual clutch gearbox (0AM)

q	Connector assignment for dual clutch gearbox (0AM)

q	Location for dual clutch gearbox (0B5)

q	Connector assignment for dual clutch gearbox (0B5)

q	Connector assignment

5 -

6 -

Garage door operation control unit -J530-

q

Location

q	Connector assignment

8 -	Simos control unit -J361-/Motronic control unit -J220-/Diesel direct injection system control unit -J248-/Engine control unit -J623-

q

Location

q	Connector assignment, 121 pin

q	Connector assignment, 154 pin

9 -

10 -

Auxiliary heater control unit -J364-

q	under the longitudinal member on front right

q	Connector assignment

q	Connector assignment, 47 pin

q	Connector assignment, 26 pin

Battery monitor control unit -J367-

Location: on battery -2- in left of engine compartment

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AUDI A3 2008 Automatic gearbox control unit J217 Automatic gearbox control unit -J217- Location: under front left wing, near A pillar

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Connector assignment.

A -	Automatic gearbox control unit -J217-

Connector:

B -	52-pin connector -T52-

AUDI A3 2008 Wiper motor control unit J400 Location: in plenum chamber atwindscreen wiper motor -V-

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AUDI A3 2008 Mechatronic unit for dual clutch gearbox J743 Mechatronic unit for dual clutch gearbox -J743- Location: on gearbox

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Connector assignment.

A -	Mechatronic unit for dual clutch gearbox -J743-

Connector:

B -	20-pin connector -T20e-

AUDI A3 2008 Mechatronic unit for dual clutch gearbox J743 Mechatronic unit for dual clutch gearbox -J743-

Location: on gearbox

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Connector assignment.

-	Mechatronic unit for dual clutch gearbox -J743-

Connector:

A -	25-pin connector -T25-

AUDI A3 2008 Mechatronic unit for dual clutch gearbox J743 Mechatronic unit for dual clutch gearbox -J743- Fitting location in engine compartment, left

A -	Mechatronic unit for dual clutch gearbox -J743-

B -	16-pin connector -T16j-

AUDI A3 2008 Power steering control unit J500 Power steering control unit -J500-

Location: on steering box -arrow-

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Connector assignment.

A -	Power steering control unit -J500-

Connector:

B -	5-pin connector -T5-

C -	5-pin connector -T5a-

D -	2-pin connector -T2a-

AUDI A3 2008 Left gas discharge light control unit J343 / Right gas discharge light control unit J344 Location: on headlight housing

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AUDI A3 2008 Garage door operation control unit J530 Garage door operation control unit -J530- Location: under front bumper-1-

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Connector assignment.

-	Garage door operation control unit -J530-

Connector:

A -	4-pin connector -T4ak-

AUDI A3 2008 Radiator fan control unit J293 Location: am Motor für Radiator fan -V7-

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AUDI A3 2008 Simos control unit J361 / Motronic control unit J220 / Diesel direct injection system control unit J248 / Engine control unit J623 Simos control unit -J361-/Motronic control unit -J220-/Diesel direct injection system control unit -J248-/Engine control unit -J623- Location: central in plenum chamber -arrow-

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Connector assignment, 121 pin:

A -	Engine control unit -J623-

Connector:

B -	Steckverbindung, 81fach -T81-

C -	Steckverbindung, 40fach -T40-

-T121-made up of items B and C.

Connector assignment, 154 pin:

A -	Engine control unit

Connector:

B -	Steckverbindung, 94fach -T94-

C -	Steckverbindung, 60fach -T60-

AUDI A3 2008 ABS control unit J104 Location: On bulkhead, in engine compartment, right -arrow-

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Steckerbelegung :

A -	ABS control unit (MK60) -J104-

Connector:

B -	Steckverbindung, 47fach

Steckerbelegung :

A -	ABS control unit (MK70) -J104-

Connector:

B -	Steckverbindung, 26fach

AUDI A3 2008 Auxiliary heater control unit J364

Auxiliary heater control unit -J364-

Connector assignment.

1 -	Auxiliary heater control unit -J364-

Connector:

2 -	2-pin connector -T2v-

3 -	2-pin connector -T2x-

5 -	4-pin connector -T4u-

6 -	8-pin connector -T8r-

7 -	3-pin connector -T3j-

8 -	8-pin connector -T8q-

AUDI A3 2008 Overview of control units

Overview of control units

1 -	Control​ units​ on​ right​ in​ luggage​ compartment

q	Components: -J345-, -J393-, -J446-, -J791-

q	Fitting location

q	Connector assignment-J345-

q	Connector assignment-J393-

q	Connector assignment-J446-/ -J791-

2 -

q	Location of -J415-

q	Location of -J86-

q	Location of -J146-

q	Location of -J44-

q	Connector assignment

Location: A -  Parking​ aid​ control​ unit -J446-/ Park assist steering control unit -J791- B -  Trailer​ detector​ control​ unit -J345- C -  Convenience system central control unit -J393-

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Connector assignment.

A -	Trailer​ detector​ control​ unit -J345-

Connector assignment.

A -	Convenience system central control unit -J393-

Connector assignment.

A -	Parking aid control unit -J446-

Control units on left in luggage compartment

   

Location: 3 -  Aerial​ amplifier​ for​ mobile​ telephone -R86-

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Location: 2 -  Navigation​ system​ with​ CD​ drive​ control​ unit​ -J401-

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Location: Satellite radio -R146-

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Location: Navigation system tuner for TV -J415-

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Location: Amplifier with bass loudspeaker, on left in luggage compartment -R44-

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All-wheel drive control unit -J492- Location: on rear axle differential, front left

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Connector assignment.

-	All-wheel drive control unit -J492-

Connector:

A -	2-pin connector -T2ax-

B -	8-pin connector -T8y-

AUDI A3 2008 Overview of earth points in front part of vehicle

Overview of earth points in front part of vehicle

q	is dropped, from model year 2005

q	is dropped, from model year 2005

4 -	Earth point 4, on front of left longitudinal member -674-

q	Fitting location

q	applicable from model year 2005

q	is dropped from model year 2009

q	is dropped, from model year 2005

5 -	Earth point, on left headlight -655-

q	Fitting location

q	applicable from model year 2005

7 -	Earth point 1, on front of left longitudinal member -671-

q	Fitting location

q	is dropped from model year 2009

q	is dropped from model year 2009

q	Only right-hand drive models

Overview of earth points in interior of vehicle

5 -	Earth point (audio), under centre console, front -610-

q	Fitting location

8 -	Earth point, airbag control unit -637-

q	Fitting location

q	is dropped, from model year 2005

Overview of earth points in rear part of vehicle (3-door models)

q	for 5-door models ⇒ page Item

q	for 5-door models ⇒ page Item

q	for 5-door models ⇒ page Item

q	for 5-door models ⇒ page Item

Overview of earth points in rear part of vehicle (5-door models)

12 Earth point, on left in engine compartment, near the battery --Arrow-- Torque: 15 Nm

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607 Earth point, on left in plenum chamber, windscreen wiper motor --Arrow-- Torque: 10 Nm

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609 Earth point, on right in plenum chamber, near air quality sensor --Arrow-- Torque: 10 Nm is dropped, from model year 2005

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656 Earth point, on right headlight --Arrow-- Torque: 10 Nm is dropped from model year 2009

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673 Earth point 3, on front of left longitudinal member --Arrow-- Torque: 10 Nm is dropped from model year 2009

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671 Earth point 1, on front of left longitudinal member -Arrow A- Torque: 15 Nm    655 Earth point, on left headlight, on longitudinal member -Arrow B- Torque: 10 Nm is dropped, from model year 2005

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674 Earth point 4 on front of left longitudinal member -Arrow B- Torque: 10 Nm applicable from model year 2005 is dropped from model year 2009    655 Earth point, on left headlight, on longitudinal member -Arrow C- Torque: 10 Nm applicable from model year 2005

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674 Earth point 4 on front of left longitudinal member -Arrow C- Torque: 10 Nm is dropped, from model year 2005

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615 Earth point, on left suspension strut --Arrow-- Earth points, in interior

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43 Earth point, lower part of right A-pillar -Arrow A- Torque: 10 Nm    638 Earth point, right A-pillar -Arrow B- Torque: 10 Nm

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44 Earth point, lower part of left A-pillar -Arrow A- Torque: 10 Nm    639 Earth point, left A-pillar -Arrow B- Torque: 10 Nm

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610 Earth point (audio), front under centre console -Arrow A- Torque: 10 Nm    637 Earth point, airbag control unit -Arrow B- Torque: 10 Nm is dropped, from model year 2005

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662 Earth point, rear left side panel --Arrow-- Torque: 10 Nm Earth point, in luggage compartment

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51 Earth point, on right in luggage compartment --Arrow-- Torque: 20 Nm

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53 Earth point, on right in rear lid --Arrow-- Torque: 10 Nm

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61 Earth point, left C-pillar --Arrow-- Torque: 10 Nm

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62 Earth point, right C-pillar --Arrow-- Torque: 10 Nm

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AUDI A3 2008 Overview of relay

Overview of relay    

1 -	Relay​ carrier​ on​ electronics​ box​

q	in left of engine compartment.

q	Components: -J271-, -J317-, -J363-, -J757-, -J329- , -J469-

q	Position of relays on electronics box low, from model year 2006

q	Position of relays on electronics box high, from model year 2004

q	Position of relays on electronics box high, from model year 2006

2 -	Relay carrier on left under dash panel

q	Components: -J17-, -J49-, -J359-, -J682-, -J360-, -J663-, -J151-, -J39-, -J662-, -J832-, -J906-, -J907-, -J910--J789-

q	Position of relays, from model year 2004

q	Position of relays, from model year 2009

3 -	Position of relays on main fuse box, in luggage compartment, rear right

q	Components: -J655-, -J253-

q	Position of relays, from model year 2004

4 -

q	Position of relays, from model year 2010

5 -	Relay carrier under electronics box

q	Components: -J179-, -J299-

q	Position of relays, from model year 2004

Position of relays on electronics box low, from model year 2006

1 -	Motronic current supply relay -J271-

q

Slot A1

q	for models with engine codes BLF, BLR, BLY, BVY, BVZ, BPT, BPU, BYT, CMSA, CAXC, BZB, CAWB, CBFA, CCTA, CDAA, CCZA, CBZB only

1 -	Terminal 30 voltage supply relay -J317-

q

Slot A1

q	for models with engine codes BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA

1 -	Current supply relay for Simos control unit -J363-

q

Slot A1

q	for models with engine codes BSE, BSF, CCSA, CMXA only

2 -	Wiring bridges, Automatic glow period control unit

q

Slot A2

q	for models with engine codes BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA only

2 -

q	for models from model year 2009, with engine code CBFA

2 -	Additional​ coolant​ pump​ relay -J496-

q

Slot A2

q	for models with engine code CAXC, CMSA only

AUDI A3 2008 Position of relays on electronics box high, from model year 2004

Position of relays on electronics box high, from model year 2004

1 -	Terminal 15 voltage supply relay -J329-

q

Slot R1

2 -	Terminal 50 voltage supply relay -J682-

q

Slot R2

3 -	Motronic current supply relay -J271-

q

Slot R4

3 -	Terminal 30 voltage supply relay -J317-

q

Slot R4

q	not for models with US equipment

3 -	Current supply relay for Simos control unit -J363-

q

Slot R4

q	not for models with US equipment

4 -	Fuel pump relay -J17-

q

Slot R3

AUDI A3 2008 Position of relays on electronics box high, from model year 2006

Position of relays on electronics box high, from model year 2006

1 -	Motronic current supply relay -J271-

q

Slot R1

q	for models with engine codes AXX, BPY, BWA, BHZ, BUB, BMJ, CDLA, CDLC, CBRA, BZC, CEPA, CEPB only

2 -	Continued coolant circulation relay -J151-

q

Slot R2

q	for models with engine codes AXX, BPY, BWA, BHZ, BUB, BMJ, CDLA, CDLC, CBRA, BZC only

2 -	Additional​ coolant​ pump​ relay -J496-

q

Slot R2

q	for models with engine code CEPA, CEPB only

3 -	Fuel pump relay -J17-

q

Slot R4

q	for models with engine codes BUB, BMJ, CBRA only

3 -	Engine component current supply relay -J757-

q

Slot R4

q	for models with engine codes AXX, BPY, BWA, BHZ, CDLA, CDLC, BZC, CEPA, CEPB only

4 -	Not assigned

q

Slot R3

AUDI A3 2008 Relay positions relay carrier on onboard supply control unit, under left dash panel, from model year 2004

Relay positions relay carrier on onboard supply control unit, under left dash panel, from model year 2004

1 -	Terminal 15 voltage supply relay 2 -J681-

q

Slot B1

2 -	Not assigned

q

Slot B2

3 -	Heated rear window relay -J9-

q

Slot B5

4 -	Horn relay -J413-

q

Slot B6

5 -	X-contact relief relay -J59-

q

Slot B9

6 -	Double washer pump relay 1 -J729-

q

Slot B8

7 -	Double washer pump relay 2 -J730-

q

Slot B7

8 -	Not assigned

q

Slot B3

9 -	Terminal 30 voltage supply relay 2 -J689-

q

Slot B4

AUDI A3 2008 Relay positions relay carrier on onboard supply control unit, under left dash panel, from model year 2010

Relay positions relay carrier on onboard supply control unit, under left dash panel, from model year 2010

1 -	Terminal 15 voltage supply relay 2 -J681-

2 -	Heated rear window relay -J9-

3 -	Horn relay -J413-

3 -	Headlight washer system relay -J39-

4 -	X-contact relief relay -J59-

5 -	High heat output relay -J360-

q	for models with auxiliary air heating only

-J39- and -J413- are​ mini-relays​ and​ can​ be​ found​ on​ a​ relay​ slot.

AUDI A3 2008 Relay positions under left dash panel, from model year 2004

Relay positions under left dash panel, from model year 2004

1 -	Headlight washer system relay -J39-

2 -	Fuel pump relay -J17-

q

Slot 2.1

q	for models with diesel engines only

q	is dropped from model year 2006

q	for models with petrol engines and electronics box low, from May 2005

q	for models with diesel engines and electronics box low, from May 2005

q	for models with petrol engines and electronics box low, from August 2005

q	for models with diesel engines and electronics box low, from August 2005

q	for models from model year 2004 with electronics box high, engine codes BGU, BDB, BMJ,

q	for models from model year 2006 with electronics box high, engine codes BUB, BMJ,

2 -	Electric fuel pump 2 relay -J49-

q

Slot 2.1

q	for models with petrol engines only

q	not for models with engines FSI

q	is dropped from model year 2006

q	for models with petrol engines, from May 2005

q	for models with petrol engines, from August 2005

q	for models with diesel engines, from November 2006

2 -	Electric fuel pump 2 relay -J49-

q

Slot 2.2

q	for models with petrol engines only

q	not for models with engines FSI

q	applicable from May 2005

q	is dropped from August 2005

2 -	Fuel pump relay -J17-

q

Slot 2.2

q	applicable from May 2005

q	is dropped from August 2005

q	for models with diesel engines only

2 -	Low heat output relay -J359-

q	applicable from November 2006, only for models with auxiliary air heater

q	for models with diesel engines only

3 -	Terminal 50 voltage supply relay -J682-

q	applicable from May 2005

q	is dropped from August 2005

q	for models from model year 2004

q	for models from August 2005

3 -	High heat output relay -J360-

q	applicable from November 2006, only for models with auxiliary air heater

q	for models with diesel engines only

4 -	Electric fuel pump 2 relay -J49-

q

Slot 5.1

q	not for models with US equipment

q	applicable from November 2006, only for models with auxiliary heater

q	for models with diesel engines only

5 -	Continued coolant circulation relay -J151-

q

Slot 5.1

q	applicable from model year 2007

q	for models with engine codes BPT, BPU, BYT, BZB, CAWB, CBFA, CCTA only

q	for models from model year 2004,

q	for models from model year 2006, engine codes AXX, BPY, BWA, BHZ, BUB, BMJ, BZC, CDLA, CDLC

5 -	Engine components current supply relay -J757-

q

Slot 5.2

q	applicable from model year 2007

q	for models with engine code CBFA only

Electric fuel pump 2 relay -J49-

q

Slot 5.2

q	applicable from August 2005

q	for models with petrol engines only

q	not for models with engines FSI

5 -

AUDI A3 2008 Relay positions under left dash panel, from model year 2009

Relay positions under left dash panel, from model year 2009

1 -	Low heat output relay -J359-

q	for models with auxiliary air heating only

1 -	Control relay -J789-

q	for models with engine code CEPA, CEPB only

q	applicable from model year 2011

2 -	Terminal 50 voltage supply relay -J682-

q	only models without stop/start system

3 -	Supplementary fuel pump relay -J832-

q

Slot 3.1

q	for models with engine codes CBAA, CBAB, CBBB only

q	is dropped from model year 2010

q	for models from model year 2010

3 -	Starter relay 1 -J906-

q

Slot 3.1

q	applicable from model year 2010

q	only models with stop/start system

3 -	Headlight washer system relay -J39-

q

Slot 3.2

q	is dropped from model year 2010

q	for models from model year 2010

3 -	Starter relay 2 -J907-

q

Slot 3.2

q	applicable from model year 2010

q	only models with stop/start system

4 -	Fuel pump relay -J17-

q

Slot 4.1

q	for models with engine codes BSE, CCSA, BLS, BXE, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB, CLJA only

q	dropped from model year 2010 for models with engine code BSE, BSF, CCSA, CMXA

q	for models with engine codes BUB, CBRA

4 -	Electric fuel pump 2 relay -J49-

q

Slot 4.1

q	for models with engine codes BUB, CBRA only

q	applicable from model year 2010 for models with engine code BSE, BSF, CCSA, CMXA

4 -	Continued coolant circulation relay -J151-

q

Slot 4.1

q	for models with engine codes CDAA, CCZA, CAWB, CCTA, CBFA only

q	for models with engine codes BUB, CBRA

4 -	Electric fuel pump 2 relay -J49-

q

Slot 4.2

q	for models with engine codes BSE, BSF, CCSA, CMXA or with auxiliary heater only, engine codes BLS, BXE, CBBB, CBAB, CBAA, CAYB, CAYC, CFFA, CFFB, CFGB, CLJA

q	dropped from model year 2010 for models with engine code BSE, BSF, CCSA, CMXA

4 -	Fuel pump relay -J17-

q

Slot 4.2

q	applicable from model year 2010 for models with engine code BSE, BSF, CCSA, CMXA

4 -	Engine components current supply relay -J757-

q

Slot 4.2

q	for models with engine code CBFA only

5 -	High heat output relay -J360-

q	for models with auxiliary air heating only

q	is dropped from model year 2010

q	for models from model year 2010

5 -	Automatic​ anti-dazzle​ interior​ mirror​ relay​ -J910-

q

Slot 5.1

q	applicable from model year 2010

5 -

AUDI A3 2008 Position of relays under electronics box

Position of relays under electronics box

1 -	Not assigned

2 -	Automatic glow period control unit -J179-

q

Slot R2

q	not for models with US equipment

q	applicable from model year 2004

q	is dropped from model year 2006

q	for models from model year 2006

3 -	Not assigned

4 -	Continued coolant circulation relay -J151-

q

Slot R6

q	applicable from model year 2004

q	is dropped from model year 2006

5 -	Secondary air pump relay -J299-

q

Slot R5

q	applicable from model year 2004

q	for models with electronics box low, from model year 2006

q	for models with electronics box high, from model year 2009

6 -	Not assigned

The relay carrier is only visible when the electronics box is removed.

AUDI A3 2008 Position of relays under electronics box Position of relays under electronics box Position of relays under electronics box low, from model year 2006 1 -  Relay carrier under electronics box in engine compartment, left 2 -  Automatic glow period control unit -J179- 3 -  Not assigned Position of relays under electronics box high, from model year 2009 1 -  Relay carrier under electronics box in engine compartment, left 2 -  Not assigned 3 -  Secondary air pump relay -J299-   Note: The relay carrier is only visible when the electronics box is removed.

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AUDI A3 2008 Position of relays on main fuse box, in luggage compartment, rear right

Position of relays on main fuse box, in luggage compartment, rear right

5 -	Battery cut-off relay -J655-

5 -	Battery isolation igniter -N253-