AUDI A3 2008 – Convenience system . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2008 - Earth points - earth connections

98	Earth connection, in rear lid wiring harness
370	Earth connection 5, in main wiring harness
371	Earth connection 6, in main wiring harness
*	for models without radio only
**	for models with radio only

Wiring Diagram AUDI A3 2008 - Earth points - earth connections

366	Earth connection 1, in main wiring harness
367	Earth connection 2, in main wiring harness
368	Earth connection 3, in main wiring harness
369	Earth connection 4, in main wiring harness
372	Earth connection 7, in main wiring harness

Wiring Diagram AUDI A3 2008 - Fuses on fuse holder

SC12	Fuse 12 on fuse holder C
SC23	Fuse 23 on fuse holder C
SC28	Fuse 28 on fuse holder C
SC38	Fuse 38 on fuse holder C
SC43	Fuse 43 on fuse holder C
B272	Positive connection (30), in main wiring harness
B302	Positive connection 6 (30), in main wiring harness
*	⇒ applicable Current Flow Diagram with battery in engine compartment
**	⇒ applicable Current Flow Diagram with battery in luggage compartment
***	for models with 5-door models only

Wiring Diagram AUDI A3 2008 - Fuses on fuse holder - terminal 15 voltage supply relay 2

J519	Onboard supply control unit
J681	Terminal 15 voltage supply relay 2
J689	Terminal 30 voltage supply relay 2
SB28	Fuse 28 on fuse holder B
SB49	Fuse 49 on fuse holder B
SC2	Fuse 2 on fuse holder C
SC13	Fuse 13 on fuse holder C
SC15	Fuse 15 on fuse holder C
SC17	Fuse 17 on fuse holder C
T2t	2-pin connector, black (connector L)
T10d	10-pin connector, black (connector K)
T40	40-pin connector, black, on electronics box in engine compartment (connector J)
B273	Positive connection (15), in main wiring harness
B277	Positive connection 1 (15a), in main wiring harness
B316	Positive connection 2 (30a), in main wiring harness
*	for models with anti-theft alarm system only
***	for models with interior light only
#	for models with electronics box low only, ⇒ Fitting locations
##	for models with electronics box high only, ⇒ Fitting locations

Wiring Diagram AUDI A3 2008 - Interior light (front and rear) with reading lights

J519	Onboard supply control unit
T12c	12-pin connector, black (connector B)
W	Front interior light
W11	Rear left reading light
W12	Rear right reading light
W13	Front passenger side reading light
W19	Driver side reading light
W43	Rear interior light
369	Earth connection 4, in main wiring harness
371	Earth connection 6, in main wiring harness
B466	Connection 2 in main wiring harness
B467	Connection 3, in main wiring harness
**	for models with reading lights only

Wiring Diagram AUDI A3 2008 - Bonnet contact switch - driver and front passenger vanity mirror contact switch

F147	Driver vanity mirror contact switch
F148	Front passenger side vanity mirror contact switch
F266	Bonnet contact switch
J519	Onboard supply control unit
L120	Storage compartment illumination bulb
L121	Cup holder illumination bulb
T8h	8-pin connector, black (connector F)
T10d	10-pin connector, black (connector K)
W14	Front passenger side illuminated vanity mirror
W20	Driver side illuminated vanity mirror
366	Earth connection 1, in main wiring harness
368	Earth connection 3, in main wiring harness
B466	Connection 2 in main wiring harness
*	for models with illuminated vanity mirror without garage door operation only

Wiring Diagram AUDI A3 2008 - Left and right footwell light - glove compartment light

E26	Glove compartment light switch
J393	Convenience system central control unit
J519	Onboard supply control unit
T8a	8-connector, black, near glove compartment
T12c	12-pin connector, black (connector B)
T12e	12-pin connector, black (connector G)
T18	18-pin connector, brown (connector A)
W6	Glove compartment light
W9	Left footwell light
W10	Right footwell light
368	Earth connection 3, in main wiring harness
372	Earth connection 7, 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
B466	Connection 2 in main wiring harness

Wiring Diagram AUDI A3 2008 - Central locking and anti-theft alarm system aerial

J393	Convenience system central control unit
R47	Central locking and anti-theft alarm system aerial
R108	Left aerial module
R111	Aerial amplifier 2
T2h	2-pin connector, on right C-pillar
T18	18-pin connector, brown (connector A)
Z24	Heated rear window with window aerial
370	Earth connection 5, 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
*	not for models with radio or radio navigation system
**	for models with radio or radio navigation system only

Wiring Diagram AUDI A3 2008 - Rear lid central locking motor

F123	Rear lid contact switch for anti-theft alarm system
J245	Sliding sunroof adjustment control unit
J393	Convenience system central control unit
T6a	6-pin connector, black, on left C-pillar
T6b	6-pin connector, blue, sunroof, near interior light
T8b	8-pin connector, brown, on left C-pillar
T8g	8-pin connector, black (connector B)
T18	18-pin connector, brown (connector A)
V53	Rear lid central locking motor
98	Earth connection, in rear lid wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	⇒ applicable Current Flow Diagram: sliding/tilting sunroof
**	for models with 3-door models only
***	for models with 5-door models only

Wiring Diagram AUDI A3 2008 - Parking brake contact switch - tank filler flap locking motor - luggage compartment light

E234	Rear lid handle release button
E286	Rear central switch for interior locking
F321	Parking brake contact switch
J393	Convenience system central control unit
T6g	6-pin connector, black (connector E)
T8b	8-pin connector, brown, on left C-pillar
T8g	8-pin connector, black (connector B)
T18	18-pin connector, brown (connector A)
V155	Tank filler flap locking motor
W3	Luggage compartment light
98	Earth connection, in rear lid wiring harness
369	Earth connection 4, in main wiring harness
371	Earth connection 6, in main wiring harness
372	Earth connection 7, 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
#	F248 is replaced by E234
**	for models with US equipment only

Wiring Diagram AUDI A3 2008 - Alarm horn - vehicle inclination sender - glass breakage sensor for rear window - interior monitoring sensor

G273	Interior monitoring sensor
G304	Glass breakage sensor for rear window
G384	Vehicle inclination sender
H12	Alarm horn
J393	Convenience system central control unit
J529	Anti-theft and tilt system control unit
T6a	6-pin connector, black, on left C-pillar
T6g	6-pin connector, black (connector E)
98	Earth connection, in rear lid wiring harness
372	Earth connection 7, in main wiring harness
B317	Positive connection 3 (30a), 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
B528	Connection 1 (LIN bus), in main wiring harness
*	for models with anti-theft alarm system only
**	for models with interior monitoring sensor only
##	not for models with US equipment

Wiring Diagram AUDI A3 2008 - Window regulator switch - driver side

E39	Rear window regulator isolation switch
E40	Front left window regulator switch
E41	Front right window regulator switch
E53	Rear left window regulator switch, in driver door
E55	Rear right window regulator switch, in driver door
J386	Driver door control unit
T20	20-pin connector, black, door A-pillar left
T20f	20-pin connector, black (connector A)
T32a	32-pin connector, grey (connector C)
V147	Driver side window regulator motor
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	for models with interior monitor only
**	for models without interior monitor only
***	for models with 5-door models only

Wiring Diagram AUDI A3 2008 - Driver side central locking lock unit - central locking deadlock function warning lamp

F2	Driver door contact switch
F131	Front left central locking actuator
F220	Driver side central locking lock unit
F241	Driver side contact switch in lock cylinder
J386	Driver door control unit
T20f	20-pin connector, black (connector A)
V56	Driver door central locking motor
V161	Driver door central locking deadlock function motor
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness

Wiring Diagram AUDI A3 2008 - Driver side interior locking button - central locking deadlock function warning lamp

E308	Driver side interior locking button
J386	Driver door control unit
K133	Central locking deadlock function warning lamp
T8d	8-pin connector, black, behind centre console
T20	20-pin connector, black, door A-pillar left
T20f	20-pin connector, black (connector A)
T32a	32-pin connector, grey (connector C)
205	Earth connection, in driver door wiring harness
372	Earth connection 7, 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
#	E150 is replaced by E308

Wiring Diagram AUDI A3 2008 - Mirror adjustment switch - alarm system off switch

E43	Mirror adjustment switch
E48	Mirror adjustment change-over switch
E168	Adjustment switch for mirror with fold-in feature
E183	Interior monitoring deactivation switch
E217	Alarm system off switch
J386	Driver door control unit
T32a	32-pin connector, grey (connector C)
205	Earth connection, in driver door wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
R52	Connection (58s), in driver side door wiring harness
*	for models with interior monitor only

Wiring Diagram AUDI A3 2008 - Rear lid remote release button - fuel tank flap release button - driver door opener illumination bulb - driver side door warning lamp - front left entry light

E233	Rear lid remote release button
E319	Fuel tank flap release button
L108	Driver door opener illumination bulb
J386	Driver door control unit
T32a	32-pin connector, grey (connector C)
W30	Driver side door warning lamp
W31	Front left entry light
267	Earth connection 2, in driver door wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
R52	Connection (58s), in driver side door wiring harness
*	for models with driver door opener illumination bulb only
**	for models with US equipment only
***	for models with driver side door warning lamp and front left entry light only
****	not for models with US equipment

Wiring Diagram AUDI A3 2008 - Mirror adjustment motor/fold-in mirror motor - driver side

J386	Driver door control unit
T16b	16-pin connector, (connector B)
T20	20-pin connector, black, door A-pillar left
T20f	20-pin connector, black (connector A)
V17	Driver side mirror adjustment motor
V121	Driver side fold-in mirror motor
V149	Driver side mirror adjustment motor
Y20	Driver side automatic anti-dazzle exterior mirror
Z4	Driver side heated exterior mirror
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	for models with automatic anti-dazzle interior mirror only
**	for models with automatic anti-dazzle exterior mirror only

Wiring Diagram AUDI A3 2008 - Front passenger side central locking lock unit

F3	Front passenger door contact switch
F133	Front right central locking actuator
F221	Front passenger side central locking lock unit
J387	Front passenger door control unit
T20a	20-pin connector, black, door A-pillar right
T20g	20-pin connector, black (connector A)
V57	Front passenger door central locking motor
V148	Front passenger side window regulator motor
V162	Front passenger door central locking deadlock function motor
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
***	for models with 5-door models only

Wiring Diagram AUDI A3 2008 - Mirror adjustment motor/fold-in mirror motor - front passenger side

J387	Front passenger door control unit
T16c	16-pin connector, (connector B)
T20a	20-pin connector, black, door A-pillar right
T20g	20-pin connector, black (connector A)
V25	Front passenger side mirror adjustment motor
V122	Front passenger side fold-in mirror motor
V150	Front passenger side mirror adjustment motor
Y7	Automatic anti-dazzle interior mirror
Y21	Front passenger side automatic anti-dazzle exterior mirror
Z5	Front passenger side heated exterior mirror
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
B427	Connection 1 (mirror signal), in main wiring harness
B428	Connection 2 (mirror signal), in main wiring harness
*	for models with automatic anti-dazzle interior mirror only
**	for models with automatic anti-dazzle exterior mirror only

Wiring Diagram AUDI A3 2008 - Front right entry light - front passenger side door warning lamp - window regulator switch in front passenger door

E107	Window regulator switch in front passenger door
E309	Front passenger side interior locking button
J387	Front passenger door control unit
L109	Front passenger door opener illumination bulb
T32b	32-pin connector, grey (connector C)
W32	Front right entry light
W36	Front passenger side door warning lamp
206	Earth connection, in door wiring harness, front passenger side
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	for models with front passenger side door opener illumination only
**	for models with US equipment only
***	for models with front passenger side door warning lamp and front right entry light only
****	not for models with US equipment
*****	not for models with front passenger side door opener illumination

Wiring Diagram AUDI A3 2008 - Rear left door control unit

E52	Rear left window regulator switch, in door
J388	Rear left door control unit
L110	Rear left door opener illumination bulb
T20l	20-pin connector, black, door B-pillar left
T20n	20-pin connector, black (connector A)
T32e	32-pin connector, grey (connector C)
V26	Rear left window regulator motor
W33	Rear left entry light
W37	Rear left door warning lamp
207	Earth connection, in rear left door wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	for models with rear left door opener illumination bulb only
**	for models without rear left door warning lamp and rear left entry light only
***	for models with rear left door warning lamp and rear left entry light only
****	not for models with US equipment

Wiring Diagram AUDI A3 2008 - Rear left door central locking motor

F10	Rear left door contact switch
F132	Rear left central locking actuator
F222	Rear left central locking lock unit
J388	Rear left door control unit
T20n	20-pin connector, black (connector A)
V115	Rear left door central locking motor
V163	Rear left door central locking deadlock function motor
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness

Wiring Diagram AUDI A3 2008 - Rear right door control unit

E54	Rear right window regulator switch, in door
J389	Rear right door control unit
L111	Rear right door opener illumination bulb
T20m	20-pin connector, black, door B-pillar right
T20o	20-pin connector, black (connector A)
T32f	32-pin connector, grey (connector C)
V27	Rear right window regulator motor
W34	Rear right entry light
W38	Rear right door warning lamp
208	Earth connection, in rear right door wiring harness
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness
*	for models with rear right door opener illumination bulb only
**	for models without rear right door warning lamp and rear right entry light only
***	for models with rear right door warning lamp and rear right entry light only
****	not for models with US equipment

Wiring Diagram AUDI A3 2008 - Rear right door control unit - rear right central locking lock unit

F11	Rear right door contact switch
F134	Rear right central locking actuator
F223	Rear right central locking lock unit
J389	Rear right door control unit
T20o	20-pin connector, black (connector A)
V97	Rear right door central locking motor
V164	Rear right door central locking deadlock function motor
B397	Connection 1 (convenience CAN bus, high), in main wiring harness
B406	Connection 1 (convenience CAN bus, low), in main wiring harness

Wiring Diagram AUDI A3 2008 - Control unit in dash panel insert - data bus diagnostic interface

J285	Control unit in dash panel insert
J533	Data bus diagnostic interface
K102	Rear lid closed warning lamp
K166	Door open warning lamp
K201	Fuel tank flap lock warning lamp
SB12	Fuse 12 on fuse holder B
SB24	Fuse 24 on fuse holder B
T20d	20-pin connector, yellow (connector A)
T32	32-pin connector, blue (connector A)
T40	40-pin connector, black, on electronics box in engine compartment (connector J)
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
#	for models with electronics box low only, ⇒ Fitting locations
##	for models with electronics box high only, ⇒ Fitting locations

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 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

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 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-

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-