AUDI A3 2004 – Provision for radio (not factory-fitted radios) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2004 - Battery - fuse on fuse box

J519	Onboard power supply control unit
SB19	Fuse 19 on fuse box
T8	8-pin connector, black (connector A)
T12c	12-pin connector, black (connector B)
T40	40-pin connector, black, at electronics box, engine compartment (connector J)
376	Earth connection 11, in main wiring harness

B467	Connection 3, in main wiring harness

Wiring Diagram AUDI A3 2004 - Front and rear loudspeakers

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R4	Loudspeaker, rear left
R5	Loudspeaker, rear right
R20	Treble loudspeaker, front left
R22	Treble loudspeaker, front right
R101	Mid-range/bass loudspeaker, front left
R102	Mid-range/bass loudspeaker, front right
T8k	8-pin connector, brown (connector B)
T20	20-pin connector, black, door, A pillar, left
T20a	20-pin connector, black, door, A pillar, right
B469	Connection 5, in main wiring harness
B470	Connection 6, in main wiring harness
B471	Connection 7, in main wiring harness
B472	Connection 8, in main wiring harness
*	Depending on vehicle equipment (K8G with 8RL)

Wiring Diagram AUDI A3 2004 - Rear loudspeakers

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R14	Treble loudspeaker, rear left
R16	Treble loudspeaker, rear right
R105	Mid-range loudspeaker, rear left
R106	Mid-range loudspeaker, rear right
T2ae	2-pin connector, black, in rear left door
T2af	2-pin connector, black, in rear right door
T8k	8-pin connector, brown (connector B)
T20l	20-pin connector, black, door, B pillar, left
T20m	20-pin connector, black, door, B pillar, right
*	Depending on vehicle equipment (K8R with 8RL)

Wiring Diagram AUDI A3 2004 - Left aerial module - rear window aerial 1

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C18	Window aerial suppression filter
J519	Onboard power supply control unit
R108	Aerial module, left
R130	Rear window aerial 1
T1	Single connector, black, in rear lid
T1a	Single connector, brown, in rear lid
T2j	2-pin connector, near C pillar, right
T6a	6-pin connector, black, at C pillar, left
T10d	10-pin connector, black (connector K)
Z1	Heated rear window
Z24	Heated rear window with window aerial
*	Applicable from model year 2005
**	Only on 3-door models
***	Only on 5-door models
****	As of model year 2005 no longer fitted

AUDI A3 2004 Overview of control units

Overview of control units

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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-

Location

13 -

q	Connector assignment

13 -

14 -

Auxiliary air heater control unit -J604-

Location

q	Connector assignment

q	not for models with US equipment

q	Connector assignment

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-

Location

20 -

Headlight range control, control unit -J431-

Location:

Below the dash panel on right, on left centre console -arrow-

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Connector assignment.

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A -	Headlight range control, control unit -J431-

Pin connector:

B -	26-pin connector -T26a-

AUDI A3 2004 Front passenger seat heating control unit J727

Front passenger seat heating control unit -J727-

Location:

Under front passenger seat

AUDI A3 2004 Front passenger seat heating control unit J727

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Connector assignment.

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-	Front passenger seat heating control unit -J727-

Pin connector:

A -	6-pin connector -T6p-

AUDI A3 2004 Sliding sunroof adjustment control unit J245

Sliding sunroof adjustment control unit -J245-

Location:

Under cover for interior light operating unit -arrow-

AUDI A3 2004 Sliding sunroof adjustment control unit J245

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Connector assignment.

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-	Sliding sunroof adjustment control unit -J245-

Pin connector:

A -	6-pin connector -T6b-

B -	6-pin connector -T6t-

AUDI A3 2004 NOx sensor control unit J583

NOx sensor control unit -J583-

Location:

on underbody, near NOx catalytic converter

AUDI A3 2004 NOx sensor control unit J583

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AUDI A3 2004 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

AUDI A3 2004 Rear left door control unit J388 / Rear right door control unit J389

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Connector assignment.

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A -	Rear left door control unit -J388-

Pin connector:

B -	32-pin connector -T32e-

C -	16-pin connector(Vacant)

D -	20-pin connector -T20n-

Connector assignment.

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A -	Rear right door control unit -J389-

Pin connector:

B -	32-pin connector -T32f-

C -	16-pin connector(Vacant)

D -	20-pin connector -T20o-

AUDI A3 2004 Control unit in dash panel insert J285

Control unit in dash panel insert -J285-

Location:

in dash panel

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Connector assignment.

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-	Control unit in dash panel insert -J285-

Pin connector:

A -	32-pin connector -T32-

AUDI A3 2004 Fuel pump control unit J538

Fuel pump control unit -J538-

Location:

Under rear seat bench, on fuel pump -arrow-

AUDI A3 2004 Fuel pump control unit J538

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Connector assignment.

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A -	Fuel pump control unit -J538-

Pin connector:

B -	10-pin connector -T10b-

AUDI A3 2004 Driver seat heating control unit J726

Driver seat heating control unit -J726-

Location:

under driver seat

AUDI A3 2004 Driver seat heating control unit J726

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Connector assignment.

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-	Driver seat heating control unit -J726-

Pin connector:

A -	6-pin connector -T6o-

AUDI A3 2004 Steering column electronics control unit J527

Steering column electronics control unit -J527-

Location:

On steering column -arrow-

AUDI A3 2004 Steering column electronics control unit J527

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Connector assignment.

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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 2004 Driver door control unit J386

Driver door control unit -J386-

Location:

In driver door -arrow-

AUDI A3 2004 Driver door control unit J386

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Connector assignment.

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A -	Driver door control unit -J386-

Pin connector:

B -	32-pin connector -T32a-

C -	16-pin connector -T16b-

D -	20-pin connector -T20f-

AUDI A3 2004 Onboard supply control unit J519

Onboard supply control unit -J519-

Location:

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

AUDI A3 2004 Onboard supply control unit J519

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Connector assignment.

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-	Onboard supply control unit -J519-

Pin 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 2004 Onboard supply control unit J519

Onboard supply control unit -J519-

Location:

Left under dash panel -arrow-

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Connector assignment.

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-	Onboard supply control unit -J519-

Pin connector:

A -	52-pin connector -T52a-

B -	52-pin connector -T52b-

C -	52-pin connector -T52c-

AUDI A3 2004 Heater control unit J65 / Heater control unit J162

Heater control unit -J65-/Heater control unit -J162-

Location:

in centre console

AUDI A3 2004 Heater control unit J65 / Heater control unit J162

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AUDI A3 2004 Climatronic control unit J255

Climatronic control unit -J255-

Location:

in centre console

AUDI A3 2004 Climatronic control unit J255

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Connector assignment.

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-	Climatronic control unit -J255-

Pin connector:

A -	12-pin connector -T12f-

B -	20-pin connector -T20j-

C -	16-pin connector -T16e-

D -	16-pin connector -T16d-

AUDI A3 2004 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.

AUDI A3 2004 Data bus diagnostic interface J533

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Connector assignment.

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A -	Data bus diagnostic interface -J533-

Pin connector:

B -	20-pin connector -T20d-

AUDI A3 2004 Fresh air blower control unit J126

Fresh air blower control unit -J126-

Location:

Under glove compartment, onFresh air blower -V2-

AUDI A3 2004 Fresh air blower control unit J126

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AUDI A3 2004 Front passenger door control unit J387

Front passenger door control unit -J387-

Location:

in front passenger door -arrow-

AUDI A3 2004 Front passenger door control unit J387

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Connector assignment.

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A -	Front passenger door control unit -J387-

Pin connector:

B -	32-pin connector -T32b-

C -	16-pin connector -T16c-

D -	20-pin connector -T20g-

AUDI A3 2004 Airbag control unit J234

Airbag control unit -J234-

Location:

Under centre console -arrow-

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Connector assignment.

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A -	Airbag control unit -J234-

Pin connector:

B -	75-pin connector -T75-

Connector assignment.

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-	Airbag control unit -J234-

Pin connector:

A -	84-pin connector -T84-

A -	84-pin connector -T84a-

Connector assignment.

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-	Airbag control unit -J234-

Pin connector:

A -	100-pin connector -T100-

A -	100-pin connector -T100a-

AUDI A3 2004 Auxiliary air heater control unit J604

Auxiliary air heater control unit -J604-

Location:

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

AUDI A3 2004 Auxiliary air heater control unit J604

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Connector assignment.

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-	Auxiliary air heater control unit -J604-

Pin connector:

A -	4-pin connector -T4l-

AUDI A3 2004 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-

AUDI A3 2004 Radio R / Control unit with display for radio and navigation system J503 (RNS-low)

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AUDI A3 2004 Navigation operating electronics control unit J402 (RNS-E)

Navigation operating electronics control unit -J402- (RNS-E)

Location:

in centre console

AUDI A3 2004 Navigation operating electronics control unit J402 (RNS-E)

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AUDI A3 2004 CD changer R41

CD changer -R41-

Location:

In glove box -arrow-

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AUDI A3 2004 Electronically controlled damping control unit J250

Electronically controlled damping control unit -J250-

Location:

Under front passenger seat -arrow-

AUDI A3 2004 Electronically controlled damping control unit J250

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Connector assignment.

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-	Electronically controlled damping control unit -J250-

Pin connector:

A -	47-pin connector -T47-

AUDI A3 2004 Tyre pressure monitor control unit J502

Tyre pressure monitor control unit -J502-

Location:

Behind the glove compartment -arrow-

AUDI A3 2004 Tyre pressure monitor control unit J502

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Connector assignment.

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-	Tyre pressure monitor control unit -J502-

Pin connector:

A -	20-pin connector -T20q-

AUDI A3 2004 Voltage stabiliser J532

Voltage stabiliser -J532-

Location:

Under driver seat -arrow-

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Connector assignment.

-	Voltage stabiliser -J532-

Pin connector:

A -	12-pin connector -T12x-

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AUDI A3 2004 Overview of fuses

Overview of fuses

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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 chapter

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

Main supply connection:

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M -	Screw connection M (terminal 30)

AUDI A3 2004 Position of fuses electronics box low, from model year 2006

Position of fuses electronics box low, from model year 2006

Designation in Wiring Diagram	Nominal value		Function/component	Terminal
Fuse 1 in 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 on battery -SA2-	80 A	-	Power steering control unit -J500-	30
Fuse 3 on fuse holder on battery -SA3-	50 A	-	Radiator fan control unit -J293- Radiator fan thermal switch -F18- radiator fan -V7-	30
Fuse 4 on fuse holder on battery -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 on battery -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 on battery -SA5-	100 A	-	Auxiliary air heater control unit -J604- is dropped from November 2005	30
Fuse 6 on fuse holder on battery -SA6-	100 A	-	Auxiliary air heater control unit -J604- applicable from November 2005	30
Fuse 7 on fuse holder on battery -SA7-	50 A	-	option doctor	30
	80 A	-	option police	30

AUDI A3 2004 Position of fuses electronics box low, from model year 2007

Position of fuses electronics box low, from model year 2007

Designation in Wiring Diagram	Nominal value		Function/component	Terminal
Fuse 1 in 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 on battery -SA2-	80 A	-	Power steering control unit -J500-	30
Fuse 3 on fuse holder on battery -SA3-	50 A	-	Radiator fan control unit -J293- Radiator fan thermal switch -F18- radiator fan -V7-	30
Fuse 4 on fuse holder on battery -SA4-	40 A	-	Low heat output relay -J359- applicable from November 2006	30
Fuse 5 on fuse holder on battery -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 on battery -SA6-	100 A	-	Auxiliary air heater control unit -J604- is dropped from November 2006	30
Fuse 6 on fuse holder on battery -SA6-	80 A	-	High heat output relay -J360- applicable from November 2006	30
Fuse 7 on fuse holder on battery -SA7-	50 A	-	option doctor	30
	80 A	-	option police	30
	30 A	-	Electronically controlled damping control unit -J250- applicable from May 2008	30

AUDI A3 2004 Main fuse holder: Position fuse holder A SA on electronics box low, from November 2008

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

Main supply connection:

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M -	Screw connection M (terminal 30)

AUDI A3 2004 Position of fuses in electronics box low, from November 2008

Position of fuses in electronics box low, from November 2008

Designation in Wiring Diagram	Nominal value		Function/component	Terminal
Fuse 1 in 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 on battery -SA2-	80 A	-	Power steering control unit -J500-	30
Fuse 3 on fuse holder on battery -SA3-	50 A	-	Radiator fan control unit -J293- Radiator fan thermal switch -F18- radiator fan -V7-	30
Fuse 4 on fuse holder on battery -SA4-	80 A	-	High heat output relay -J360-	30
Fuse 5 on fuse holder on battery -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 on battery -SA6-	40 A	-	Low heat output relay -J359-	30
Fuse 7 on fuse holder on battery -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 -J250-	30

AUDI A3 2004 Main fuse holder: Position fuse holder A SA on electronics box high

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

Main supply connection:

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1 -	Screw connection A (terminal 30)

2 -	Screw connection M (terminal 30)

3 -	Screw connection L (terminal 30)

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

Position of fuses electronics box high, from model year 2004

No.		Designation in Wiring Diagram	Nominal value		Function/component	Terminal
4	-	Fuse 1 in 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 in fuse holder A -SA1-	200 A	-	Alternator -C- (140 A)	30
5	-	Fuse 2 on fuse holder on battery -SA2-	80 A	-	Power steering control unit -J500-	30
6	-	Fuse 3 on fuse holder on battery -SA3-	80 A	-	Radiator fan control unit -J293-	30
7	-	Fuse 4 on fuse holder on battery -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 on battery -SA5-	100 A	-	Auxiliary air heater control unit -J604-	30
9	-	Fuse 6 on fuse holder on battery -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 2004 Position of fuses electronics box high, from model year 2005

Position of fuses electronics box high, from model year 2005

No.		Designation in Wiring Diagram	Nominal value		Function/component	Terminal
4	-	Fuse 1 in 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 in fuse holder A -SA1-	200 A	-	Alternator -C- (140 A)	30
5	-	Fuse 2 on fuse holder on battery -SA2-	80 A	-	Power steering control unit -J500-	30
6	-	Fuse 3 on fuse holder on battery -SA3-	80 A	-	Radiator fan control unit -J293-	30
7	-	Fuse 4 on fuse holder on battery -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 on battery -SA5-	100 A	-	Auxiliary air heater control unit -J604-	30
9	-	Fuse 6 on fuse holder on battery -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 2004 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.		Designation in Wiring Diagram	Nominal value		Function/component	Terminal
4	-	Fuse 1 in 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 on battery -SA2-	80 A	-	Power steering control unit -J500-	30
6	-	Fuse 3 on fuse holder on battery -SA3-	50 A	-	Radiator fan control unit -J293-	30
7	-	Fuse 4 on fuse holder on battery -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 on battery -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 on battery -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 on battery -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 on battery -SA6-	-	-	Not assigned	-
10	-	Fuse 7 on fuse holder on battery -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 -J250- applicable from May 2008

AUDI A3 2004 Position of fuses electronics box high, engine codes BMJ, BUB, CBRA, from model year 2006

LocationFuse holder B -SB- on electronics box low, in left engine compartment

Fuse colours

AUDI A3 2004 Position of fuses electronics box high, engine codes BMJ, BUB, CBRA, from model year 2006

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50 A - red

40 A - orange

30 A - light-green

25 A - natural (white)

20 A - yellow

15 A - light blue

10 A - red

7.5 A - brown

5 A - light-brown

3 A - purple

AUDI A3 2004 Position of fuses electronics box low, from model year 2006

Position of fuses electronics box low, from model year 2006

No.		Designation in Wiring Diagram	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	-	Treble tone horn -H2- Bass 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 heater 2 -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 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 2004 Position of fuses electronics box low, from model year 2007

Position of fuses electronics box low, from model year 2007

No.		Designation in Wiring Diagram	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- for models with stop/start system only applicable from model year 2010	30
F1	-	Fuse 1 on fuse holder B -SB1-	40 A	-	Supply for the fuses: -SC7-up to-SC10- for models without stop/start system only 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	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 system -J503-¹ for models 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)	30
F10		Fuse 10 on fuse holder B -SB10-	5 A	-	Engine control units -J...-(CAXC, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CBZB, CFFA, CFFB, CFGB) 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	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)	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...-(CAXC, BZB, CAWB, CBFA, CCTA, CDAA, CCZA, CBZB) applicable from May 2007, for models with engine codes BSE, BSF, CCSA only
F14		Fuse 14 on fuse holder B -SB14-	20 A	-	Ignition coil 1 with output stage -N-(BSE, BSF, CCSA, CBZB) Ignition coil 2 -N128- (BSE, BSF, CCSA, CBZB)	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, 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) Fuel metering valve -N290- (CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB)	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-	10A	-	Lambda probe 1 heater after catalytic converter -Z29- (CAXC, CBZB) Lambda probe heater -Z19- (CAXC, CBZB)	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 only	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 only applicable from November 2006, for models with auxiliary air heater only	87
F15	-	Fuse 15 on fuse holder B -SB15-	5 A	-	Relay for supplementary fuel pump -J832- (CBBB, CBAB, CBAA, CBEA, CFFA, CFFB, CFGB)	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	-	Treble tone horn -H2- Bass 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- for models with stop/start system only 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)	87
F20	-	Fuse 20 on fuse holder B -SB20-	10 A	-	Coolant circulation pump -V50- (CAXC)	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 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) Lambda probe 1 heater after catalytic converter -Z29- (BSE, CCSA, CCTA, CCZA, CDAA) applicable from model year 2010	87
F21	-	Fuse 21 on fuse holder B -SB21-	20 A	-	Vacuum pump relay -J57-(CAXC) Vacuum pump for brakes -V192- (CAXC)	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, CBFA, CCSA) Engine component 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) 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)
			10 A		Air mass meter -G70- (CFFA, CFFB, CFGB)
			15 A		Fuel pressure regulating valve -N276- (BLF, CAXC, BVY, BVZ, CBZB)
F24	-	Fuse 24 on fuse holder B -SB24-	10 A	-	Radiator fan control unit -J293- Engine component current supply relay -J757-(BPT, BPU, BYT, CAXC, CDAA, CAWB, CCZA, CCTA) Regulating flap control unit -J808-(CBEA) Charge pressure control solenoid valve -N75-(BPT, BPU, BYT, CAXC, CAWB, BZB, CCTA, CBFA, CDAA, CCZA) Activated charcoal filter solenoid valve 1 -N80-(BPT, BPU, BYT, BSE, BSF, BLF, BVY, BVZ, CAXC, CAWB, BZB, CCTA, CBFA, CCSA, CDAA, CCZA, CBZB) Secondary air inlet valve -N112-(CBFA) Variable intake manifold change-over valve -N156-(BSE, BSF, BLF, BVY, BVZ, CCSA) Camshaft control valve 1 -N205-(BLF, BVY, BVZ, CAXC, CAWB, BZB, CCTA, CBFA, CDAA, CCZA) Turbocharger air recirculation valve -N249-(BPT, BPU, BYT, CAXC, CAWB, BZB, CCTA, CBFA, CDAA, CCZA) Intake manifold flap valve -N316-(BPT, BPU, BYT, CAWB, BZB, CCTA, CBFA, CDAA, CCZA, CBZB) Valve for oil pressure control -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) 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, BMN, BUY, CBBB, CBAB, CBAA, CAYB, CAYC, CBEA, CFFA, CFFB, CFGB only	87
F27	-	Fuse 27 on fuse holder B -SB27-	40 A	-	Secondary air pump motor -V101- (BSE, CBFA, CCSA)
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	-	B300Positive 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	-	B300Positive 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 2004 Location Fuse holder B SB on electronics box high, in left engine compartment

LocationFuse holder B -SB- on electronics box high, in left engine compartment

Fuse colours

Get access to all wiring diagrams of the car

50 A - red

40 A - orange

30 A - light-green

25 A - natural (white)

20 A - yellow

15 A - light blue

10 A - red

7.5 A - brown

5 A - light-brown

3 A - purple

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

Position of fuses electronics box high, from model year 2004

No.		Designation in Wiring Diagram	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	-	Treble tone horn -H2- Bass 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 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 heater 2 -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	-	Heater element for crankcase breather -N79-¹ for models with heater element only	87 (15)
			5 A	-	Heater element for crankcase breather -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 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 heater 2 -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 2004 Position of fuses electronics box high, from model year 2006

Position of fuses electronics box high, from model year 2006

No.		Designation in Wiring Diagram	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	-	Treble tone horn -H2- Bass 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 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 heater 2 -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 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 2004 Position of fuses electronics box high, from model year 2007

Position of fuses electronics box high, from model year 2007

No.		Designation in Wiring Diagram	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- for models with stop/start system only applicable from model year 2010	30
F3	-	Fuse 3 on fuse holder B -SB3-	40 A	-	Supply for the fuses: -SC7-up to-SC10- for models without stop/start system only 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	-	Treble tone horn -H2- Bass tone horn -H7-	30
F6	-	Fuse 6 on fuse holder B -SB6-	15 A	-	Fuel pressure regulating valve -N276- (BPY, BWA, BHZ, BZC)	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 code 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) applicable from model year 2009	87
F8	-	Not assigned		-
F9	-	Fuse 9 on fuse holder B -SB9-	10 A	-	Charge pressure control solenoid valve -N75- Activated charcoal filter solenoid valve 1 -N80- Turbocharger air recirculation valve -N249- for models with engine codes BPY, BWA, BHZ, CDLA, CDLC, BZC 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 heater 2 -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
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- for models with stop/start system only 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- for models 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-	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
F28	-	Fuse 28 on fuse holder B -SB28-	25 A	-	Engine control units -J...- (BHZ, BUB, BWA, BPY, CDLA, BZC) 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, BUB, CDLA, CDLC, CBRA) Secondary air pump relay -J299- (BUB, CBRA)	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	-	Radiator fan control unit -J293-(BPY, BWA, BHZ, BUB, CDLA, CDLC, CBRA, BZC) Activated charcoal filter solenoid valve 1 -N80-(BUB, CBRA) Secondary air inlet valve -N112-(BUB, CBRA) Variable intake manifold change-over valve -N156-(BUB, CBRA) 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
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 only	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- for models with engine codes BUB, CBRA only	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	-	B300Positive 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	-	B300Positive 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	-	B300Positive 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	-	B300Positive 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 2004 Location Fuse holder C SC , under left dash panel

LocationFuse holder C -SC-, under left dash panel

Fuse colours

Get access to all wiring diagrams of the car

50 A - red

40 A - orange

30 A - light-green

25 A - natural (white)

20 A - yellow

15 A - light blue

10 A - red

7.5 A - brown

5 A - light-brown

3 A - purple

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

Position of fuses, fuse holder, from model year 2004

No.		Designation in Wiring Diagram	Nominal value		Function/component	Terminal
1	-	Fuse 1 on fuse holder C -SC1-	10 A	-	16-pin connector -T16-(diagnostic connector) Light 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, 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	-	Four-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 detector 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- 12 V 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	-	Electric 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 adjustment 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 2004 Position of fuses, fuse holder, from model year 2006

Position of fuses, fuse holder, from model year 2006

No.		Designation in Wiring Diagram	Nominal value		Function/component	Terminal
1	-	Fuse 1 on fuse holder C -SC1-	10 A	-	Light 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, 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-(brake lights) 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 detector 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- 12 V 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	-	Electric 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- Heater element for crankcase breather -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	-	Four-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 adjustment 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	-	Electric 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 2004 Position of fuses, fuse holder, from model year 2007

Position of fuses, fuse holder, from model year 2007

No.		Designation in Wiring Diagram	Nominal value		Function/component	Terminal
1	-	Fuse 1 on fuse holder C -SC1-	10 A	-	Light 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, 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) 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) for models without stop/start system only applicable from model year 2010	15
1	-	Fuse 1 on fuse holder C -SC1-	10 A	-	Stop/start system button -E693- for models with stop/start system only no longer fitted, phased in 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) ABS control unit -J104- Current supply relay for Simos control unit -J363-(BSE, BSF, CCSA) 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, 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 Four-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- for models with stop/start system only 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- for models without stop/start system only applicable from model year 2010	15
4	-	Fuse 4 on fuse holder C -SC4-	5 A	-	Voltage stabiliser -J532- for models with stop/start system only applicable from model year 2010	15
4	-	Fuse 4 on fuse holder C -SC4-	5 A	-	Stop/start system button -E693- for models with stop/start system only phased-in in 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) 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 source -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- for models with stop/start system only 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 detector 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	-	Light 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-(diagnosis wire) 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-(diagnosis wire) Voltage stabiliser -J532-(diagnosis wire) Engine control unit -J623-(diagnosis wire) for models with stop/start system only applicable from model year 2010	50
18	-	Fuse 18 on fuse holder C -SC18-	5 A	-	Onboard supply control unit -J519-(diagnosis wire) Engine control unit -J623-(diagnosis wire) for models with engine code CBFA only applicable from model year 2010	50
19	-	Fuse 19 on fuse holder C -SC19-	10 A	-	Four-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 -J250- 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	-	Electric 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) Fuel pump control unit -J538- (BPU, BYT, BPT, BWA, BPY, BHZ, 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) applicable from November 2006, for models with auxiliary heater only, models with engine codes BKC, BXE, AZV, BKD, BLS, BMM, BUY, BMN, CBBB, CBAB, CBAA, CAYB, CAYC, CFFA, CFFB, CFGB	30
27	-	Fuse 27 on fuse holder C -SC27-	15 A	-	Relay for supplementary fuel pump -J832-(CBBB, CBAB, CBAA, CBEA, CFFA, CFFB, CFGB) Supplementary fuel pump -V393- (CBBB, CBAB, CBAA, CBEA, CFFA, CFFB, CFGB)	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) 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 adjustment 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 system -J503-¹ for models with radio navigation system (models for Japan) only applicable from model year 2010	30
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- 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
40	-	Fuse 40 on fuse holder C -SC40-	40 A	-	Starter -B- applicable from model year 2009	15
41	-	Fuse 41 on fuse holder C -SC41-	15 A	-	Rear window wiper motor -V12- applicable from model year 2009	15
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	-	Electric 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 vehicle footwell illumination -W56-¹	15

¹ not for models with US equipment

² only models with USA equipment

AUDI A3 2004 Main fuse box: Location Fuse holder D SD In luggage compartment, rear right

Main fuse box: LocationFuse holder D -SD-In luggage compartment, rear right

Fuse locations:

Get access to all wiring diagrams of the car

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

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

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

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

No.		Designation in Wiring Diagram	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 2004 Position of fuses, main fuse box, from model year 2006

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

No.		Designation in Wiring Diagram	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 2004 Fuses on left under dash panel

Fuses on left under dash panel

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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

AUDI A3 2004 Overview of earth points in front part of vehicle

Overview of earth points in front part of vehicle

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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

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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)

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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)

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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 at 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 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 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 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), under centre console, front -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

Get access to all wiring diagrams of the car

AUDI A3 2004 – Provision for radio (not factory-fitted radios) . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2004 - Battery - fuse on fuse box

Wiring Diagram AUDI A3 2004 - Front and rear loudspeakers

Wiring Diagram AUDI A3 2004 - Rear loudspeakers

Wiring Diagram AUDI A3 2004 - Left aerial module - rear window aerial 1

AUDI A3 2004 Overview of control units

AUDI A3 2004 Front passenger seat heating control unit J727

AUDI A3 2004 Sliding sunroof adjustment control unit J245

AUDI A3 2004 NOx sensor control unit J583

AUDI A3 2004 Rear left door control unit J388 / Rear right door control unit J389

AUDI A3 2004 Control unit in dash panel insert J285

AUDI A3 2004 Fuel pump control unit J538

AUDI A3 2004 Driver seat heating control unit J726

AUDI A3 2004 Steering column electronics control unit J527

AUDI A3 2004 Driver door control unit J386

AUDI A3 2004 Onboard supply control unit J519

AUDI A3 2004 Onboard supply control unit J519

AUDI A3 2004 Heater control unit J65 / Heater control unit J162

AUDI A3 2004 Climatronic control unit J255

AUDI A3 2004 Data bus diagnostic interface J533

AUDI A3 2004 Fresh air blower control unit J126

AUDI A3 2004 Front passenger door control unit J387

AUDI A3 2004 Airbag control unit J234

AUDI A3 2004 Auxiliary air heater control unit J604

AUDI A3 2004 Radio R / Control unit with display for radio and navigation system J503 (RNS-low)

AUDI A3 2004 Navigation operating electronics control unit J402 (RNS-E)

AUDI A3 2004 CD changer R41

AUDI A3 2004 Electronically controlled damping control unit J250

AUDI A3 2004 Tyre pressure monitor control unit J502

AUDI A3 2004 Voltage stabiliser J532

AUDI A3 2004 Overview of fuses

AUDI A3 2004 Position of fuses electronics box low, from model year 2006

AUDI A3 2004 Position of fuses electronics box low, from model year 2007

AUDI A3 2004 Main fuse holder: Position fuse holder A SA on electronics box low, from November 2008

AUDI A3 2004 Position of fuses in electronics box low, from November 2008

AUDI A3 2004 Main fuse holder: Position fuse holder A SA on electronics box high

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

AUDI A3 2004 Position of fuses electronics box high, from model year 2005

AUDI A3 2004 Position of fuses electronics box high, engine codes AXX, BWA, BPY, BHZ, BZC, CDLA, CDLC, from model year 2006

AUDI A3 2004 Position of fuses electronics box high, engine codes BMJ, BUB, CBRA, from model year 2006

AUDI A3 2004 Position of fuses electronics box low, from model year 2006

AUDI A3 2004 Position of fuses electronics box low, from model year 2007

AUDI A3 2004 Location Fuse holder B SB on electronics box high, in left engine compartment

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

AUDI A3 2004 Position of fuses electronics box high, from model year 2006

AUDI A3 2004 Position of fuses electronics box high, from model year 2007

AUDI A3 2004 Location Fuse holder C SC , under left dash panel

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

AUDI A3 2004 Position of fuses, fuse holder, from model year 2006

AUDI A3 2004 Position of fuses, fuse holder, from model year 2007

AUDI A3 2004 Main fuse box: Location Fuse holder D SD In luggage compartment, rear right

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

AUDI A3 2004 Position of fuses, main fuse box, from model year 2006

AUDI A3 2004 Fuses on left under dash panel

AUDI A3 2004 Overview of earth points in front part of vehicle

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