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Audi A3 Fuse Diagram (8P; 2004-2007)

10/01/2024
Fuse Box

In this article, we consider the second-generation Audi A3 / S3 (8P) before a facelift, produced from 2003 to 2008. Here you will find fuse box diagrams of Audi A3 and S3 2004, 2005, 2006, and 2007, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout).

Fuse Layout Audi A3 / S3 2004-2007

 

 

Instrument Panel Fuse Box
 

Fuse Box Location

The fuses are behind a cover on the driver’s side. Carefully pry the fuse cover off the instrument panel using the ignition key or a screwdriver.

 

Fuse Box Diagram

 

Assignment of the fuses in the instrument panel

No Amps Function/component
1 10A Light switch
Fuel pump relay
Engine control unit
Motronic control unit
Diesel direct injection system control unit
Fuel pump control unit
16-pin connector (diagnostic connector)
2 5A ABS control unit
Brake light switch
Brake pedal switch
3 10A 2004-2005: Power steering control unit
3 5A 2006-2007:
Airbag control unit
Front passenger side airbag deactivated warning lamp
4 5A Tyre pressure monitor button
TCS and ESP button
Reversing light switch
High pressure sender
Air quality sensor
Oil level and oil temperature sender
Heater control unit
Heated rear left seat control unit
Heated rear right seat control unit
Driver seat heating control unit
Front passenger seat heating control unit
5 5A/10A 2004-2005:
Airbag control unit
Seat occupied recognition control unit
Clutch position sender
Brake light switch
Brake pedal switch
2006-2007:
Headlight range control, control unit
Headlight range control regulator
Left headlight range control motor
Right headlight range control motor
6 5A Function selection switch 2
Selector lever
Tiptronic switch
Power steering control unit
Data bus diagnostic interface
Mechatronic unit for dual clutch gearbox
Trailer detector control unit
7 5A 2004-2005:
Heater control unit
Headlight range control, control unit
Heated rear left seat switch with regulator
Heated rear right seat switch with regulator

2006-2007:
Garage door operating unit
Trailer detector control unit
Navigation system with CD drive control unit
Navigation operating electronics control unit
Parking aid control unit
Garage door operation control unit
Automatic anti-dazzle interior mirror
8 10A 2004-2005:
Garage door operating unit
Navigation system with CD drive control unit
Parking aid control unit
Garage door operation control unit
Automatic anti-dazzle interior mirror

2006-2007:
Trailer socket
9 5A 2004-2005: Four-wheel drive control unit
10 5A 2004-2005:
Selector lever
Tiptronic switch

2006-2007:
Seat occupied recognition control unit
11 5A/10A 2004-2005:
Trailer socket

2006-2007: Power output module for right headlight
12 10A Driver door control unit
Front passenger door control unit
13 10A Brake light switch (brake lights)
16-pin connector (diagnostic connector)
14 5A Automatic gearbox control unit
15 10A Onboard supply control unit
16 10A Rain and light detector sensor
Heater control unit
Climatronic control unit
Remote control receiver for auxiliary heater
17 5A Convenience system central control unit -J393-
18 5A Selector lever
Tiptronic switch
Parking aid control unit
ABS control unit (2004-2005)
19 10A Rear left door control unit
Rear right door control unit
20 5A 2006-2007: ABS control unit
21 - -
22 40A Fresh air blower control unit
23 20A/30A 2004-2005:
Headlight washer system relay
Headlight washer system pump

2006-2007:
Driver side window regulator motor
24 20A Cigarette lighter
12V socket
25 30A Heated rear window
26 20A Electric socket
27 15A Electric fuel pump 2 relay
Fuel pump control unit
Fuel pump relay
28 30A 2006-2007:
Rear left window regulator motor
Rear right window regulator motor
29 10A 2004-2005:
Motronic control unit
Diesel direct injection system control unit
Simos control unit
Fuel pump control unit
Front passenger side airbag deactivated warning lamp

2006-2007:
Air mass meter
Heater element for crankcase breather
30 10A 2006-2007: Injector, cylinder 1~6
31 5A 2004-2005:
Reversing light switch
Mechatronic unit for dual clutch gearbox

2006-2007:
Four-wheel drive control unit
31 20A 2006-2007: Vacuum pump relay
32 30A 2006-2007:
Headlight washer system pump
Headlight washer system relay
33 25A Sliding sunroof adjustment control unit
34 20A Heated rear left seat control unit
Heated rear right seat control unit
35 5A Interior monitoring sensor
Vehicle inclination sender
Alarm horn
36 10A Driver seat lumbar support adjustment switch
Front passenger seat lumbar support adjustment switch
37 20A Climatronic control unit
Driver seat heating control unit
Front passenger seat heating control unit
Front left seat heating
Front right seat heating
38 30A 2006-2007: Front passenger side window regulator motor
39 20A 2006-2007:
Multifunction switch
Automatic gearbox control unit
40   Fresh air blower switch (for models without air conditioning system only)
41 15A Rear window wiper motor
42 15A Windscreen and rear window washer pump
43 - -
44 20A Trailer detector control unit
Supply for turn signal, brake light, left tail light (2004-2005)
45 15A Trailer detector control unit
Supply for rear fog light, reversing light, right tail light (2004-2005)
46 5A Heater control unit
Climatronic control unit
Left washer jet heater element
Right washer jet heater element
47 5A 2006-2007: Power output module for left headlight
48 10A Electric socket (for driving school only)
49 5A Special vehicle fuse 6
Footwell light switch
Warning buzzer switch

 

Fuses on left under dash panel

 

No Amps Function/component
A 30A 2005: Window regulator single fuse 2
B 30A 2004-2005: Window regulator single fuse
C 30A -
D - -

 

 

 

 

Engine Compartment Fuse Box
 

Fuse Box Location

Push the two slides forward to unlatch the fuse cover.

Fuse Box Diagram

 

Version 1 (Low)

 

Assignment of the fuses in the engine compartment (low)

No Amps Function/component
F1 20A Convenience system central control unit
F2 5A Steering column electronics control unit
F3 5A Onboard supply control unit
F4 30A ABS control unit
ABS hydraulic unit
F5 15A Mechatronic unit for dual clutch gearbox
F6 5A Control unit in dash panel insert
F7 - -
F8 15A Radio
Navigation operating electronics control unit
F9 5A Navigation system with CD drive control unit
Navigation system tuner for TV
Satellite radio
Telephone transmitter and receiver unit
Aerial amplifier for mobile telephone
F10 5A Motronic control unit
Motronic current supply relay
Terminal 30 voltage supply relay
F11 20A Auxiliary heater control unit
F12 5A Data bus diagnostic interface
F13 30A Engine control unit
Diesel direct injection system control unit
F13 25A Motronic control unit
Engine control unit
F14 20A Ignition coil 1 with output stage
Ignition coil 2 with output stage
Ignition coil 3 with output stage
Ignition coil 4 with output stage
F15 15A Lambda probe 1 heater after catalytic converter
Lambda probe 2 heater after catalytic converter
Lambda probe 3 heater after catalytic converter
F15 10A Lambda probe 1 heater after catalytic converter
F15 5A Automatic glow period control unit
Fuel pump relay
F16 30A ABS control unit
ABS hydraulic pump
F17 15A Treble tone horn
Bass tone horn
F18 30A Amplifier
Amplifier with bass loudspeaker, on left in luggage compartment
F19 30A Wiper motor control unit
F21 10A/15A Lambda probe heater
Lambda probe heater 2
Lambda probe 1 heater after catalytic converter
F22 5A Brake pedal switch
Clutch position sender
F23 15A Fuel pressure regulating valve
F23 10A Exhaust gas recirculation valve
Charge pressure control solenoid valve
Exhaust gas recirculation valve 2
Exhaust gas recirculation cooler change-over valve
F23 5A Secondary air pump relay
F24 10A Map-controlled engine cooling system thermostat
Activated charcoal filter solenoid valve 1
Variable intake manifold change-over valve
Camshaft control valve 1
Intake manifold flap motor
F25 40A Onboard supply control unit (right side light, right main beam, right dipped beam, right turn signal, right fog light)
F26 40A Onboard supply control unit (left side light, left main beam, left dipped beam, left turn signal, left fog light)
F27 50A Automatic glow period control unit
Glow plug 1~4
F27 40A Secondary air pump motor
F28 40A Terminal 15 voltage supply relay 2
Supply for the fuses (instrument panel): SC1, SC2, SC3, SC4, SC5, SC6, SC7, SC8, SC9, SC10, SC11, SC29, SC30, SC31, SC39, SC47, SC49
F29 50A Supply for the fuses (instrument panel): SC18, SC20, SC32, SC33, SC34, SC35, SC36, SC37, SC44, SC45, SC48, and S131
F30 40A/50A X-contact relief relay
Supply for the fuses (instrument panel): SC40, SC41, SC42, SC46
SA1 150A/200A Alternator
SA2 80A Power steering control unit
SA3 50A Radiator fan control unit
Radiatorfan thermal switch
Radiator fan
SA4 80A Supply for the fuses (instrument panel): SC12, SC13, SC14, SC15, SC16, SC17, SC19, SC22, SC23, SC24, SC25, SC26, SC27, SC28, SC38 (is dropped from November 2005
SA5 80A Supply for the fuses (instrument panel): SC12, SC13, SC14, SC15, SC16, SC17, SC19, SC22, SC23, SC24, SC25, SC26, SC27, SC28, SC38 (applicable from November 2005)
SA5 100A Auxiliary air heater control unit (up to November 2005)
SA6 100A Auxiliary air heater control unit (applicable from November 2005)
SA7 50A/80A Option for special vehicles

 

Version 2 (High)

 

Assignment of the fuses in the engine compartment (high)

No Amps Function/component
F1 30A ABS control unit
ABS hydraulic pump
F2 30A ABS control unit
ABS hydraulic unit
F3 20A Convenience system central control unit
F4 5A Onboard supply control unit
F5 15A Treble tone horn
Bass tone horn
F6 7.5A/15A Fuel pressure regulating valve
Fuel system pressurisation pump
F6 20A 2004-2005: Output stage
F6 30A 2004-2005: Ignition coil 1~6 with output stage
F7 5A 2004-2005:
Brake light switch
Brake pedal switch
Clutch travel sender
F8 10A 2004-2005:
Map-controlled engine cooling system thermostat
Radiator fan control unit
Exhaust gas recirculation valve
Activated charcoal filter solenoid valve 1
Variable intake manifold change-over valve
Camshaft control valve 1
Exhaust camshaft control valve 1
Intake manifold flap motor
F9 10A 2004-2005:
Fuel pump relay
Continued coolant circulation relay
Automatic glow period control unit
NOx sensor control unit -
Continued coolant circulation pump
NOx sender heater

2006-2007:
Charge pressure control solenoid valve
Activated charcoal filter solenoid valve 1
Turbocharger air recirculation valve
F10 10A 2004-2005:
Secondary air pump relay
Exhaust gas recirculation valve
Charge pressure control solenoid valve
Secondary air inlet valve
Exhaust gas recirculation valve 2
Exhaust flap valve
Lambda probe 1 heater after catalytic converter
Lambda probe 2 heater after catalytic converter
Fuel system diagnostic pump

2006-2007:
Ar mass meter
Fuel system diagnostic pump
F11 10A 2006-2007:
Lambda probe heater
Lambda probe heater 2
F11 25A 2004-2005:
Motronic control unit
Simos control unit
F11 30A 2004-2005:
Diesel direct injection system control unit
F12 10A/15A 2004-2005:
NOx sensor control unit
Lambda probe heater
Lambda probe heater 2
NOx sender heater

2006-2007:
Lambda probe 1 heater after catalytic converter
Lambda probe 2 heater after catalytic converter
F13 15A/20A Mechatronic unit for dual clutch gearbox
F14 - -
F15 10A 2006-2007: Continued coolant circulation pump
F15 40A 2004-2005: Starter
F16 5A Steering column electronics control unit
F17 5A Control unit in dash panel insert
F18 30A Amplifier
Amplifier with bass loudspeaker, on left in luggage compartment
F19 15A Radio
Navigation operating electronics control unit
F20 5A Navigation system with CD drive control unit (2006-2007)
Navigation system tuner for TV (2006-2007)
Telephone transmitter and receiver unit
Aerial amplifier for mobile telephone
Satellite radio (2006-2007)
F21 10A 2004-2005:
Navigation system with CD drive control unit -
Navigation system tuner for TV
F22 - -
F23 5A 2006-2007:
Motronic control unit
Motronic current supply relay
F24 5A Data bus diagnostic interface
F25 - -
F26 10A 2004-2005:
Motronic control unit
Motronic current supply relay
F26 5A 2004-2005: Terminal 30 voltage supply relay
F27 5A/10A 2004-2005:
Heater element for crankcase breather (for models with heater element only)
F28 20A 2004-2005: Automatic gearbox control unit
F28 25A 2006-2007: Motronic control unit
F29 10A/20A 2004-2005:
Injector, cylinder 1~4 / Injector, cylinder 1~6
F29 5A 2006-2007:
Continued coolant circulation relay
Secondary air pump relay
F30 20A Auxiliary heater control unit
F31 30A Wiper motor control unit
F32 10A 2004-2005:
Injector, cylinder 1~4
Charge pressure control solenoid valve
Activated charcoal filter solenoid valve 1
Turbocharger air recirculation valve
F33 15A 2004-2005: Fuel system pressurisation pump
F33 7.5A/15A 2004-2005: Fuel pressure regulating valve
F34 - -
F35 - -
F36 - -
F37 - -
F38 10A 2004-2005:
Left headlight range control motor
Right headlight range control motor

2006-2007:
Activated charcoal filter solenoid valve 1
Variable intake manifold change-over valve
Camshaft control valve 1
Exhaust camshaft control valve 1
Radiator fan control unit
F39 5A 2004-2005:
Oil level and oil temperature sender

2006-2007:
Brake pedal switch
Clutch position sender
F40 20A 2004-2005:
Supply for the fuses (instrument panel): SC1, SC2, SC3, SC4, SC5, SC6, SC7, SC8, SC9, SC10, SC11, SC29, SC31 (for models with battery in engine compartment only)

2006-2007: Ignition coil 1~4 with output stage
F41 10A 2004-2005: Air mass meter
F42 5A/10A 2004-2005:
Fuel pump relay
Air mass meter
F42 5A 2006-2007: Engine component current supply relay
F43 20A 2004-2005: Vacuum pump relay (for petrol engines with automatic gearbox only)
F43 30A 2006-2007: Ignition coil 1~6 with output stage
F44 10A 2004-2005:
Air mass meter
Fuel system diagnostic pump
F45 10A/15A 2004-2005:
Lambda probe heater
Lambda probe 1 heater after catalytic converter
F46 10A 2004-2005:
Lambda probe heater 2
Lambda probe 1 heater after catalytic converter
Lambda probe 2 heater after catalytic converter
F47 40A Onboard supply control unit
Left side light supply, left main beam, left dipped beam, left turn signal, left fog light
F48 40A Onboard supply control unit
Right side light supply, right main beam, right dipped beam, right turn signal, right fog light
F49 40A Terminal 15 voltage supply relay 2
Supply for the fuses (instrument panel): SC1, SC2, SC3, SC4, SC5, SC6, SC7, SC8, SC9, SC10, SC11, SC29, SC30, SC31, SC47, SC49
F50 - -
F51 40A Secondary air pump relay
Secondary air pump motor
F51 50A Automatic glow period control unit
F52 40A/50A X-contact relief relay
Supply for the fuses (instrument panel): SC40, SC41, SC42, SC46
F53 50A 2004-2005:
Supply for the fuses (instrument panel): SC32, SC33, SC34, SC35, SC36, SC37, SC44, SC45 (for models with battery in engine compartment only)
Supply for the fuses (instrument panel): SC32, SC33, SC34, SC35, SC36, SC37 (for models with battery in luggage compartment only)

2006-2007:
Supply for the fuses (instrument panel): SC18, SC20, SC32, SC33, SC34, SC35, SC36, SC37, SC44, SC45, SC48, and S131
F54 50A 2004-2005:
Radiator fan thermal switch
Radiator fan control unit
SA1 150A/200A Alternator
SA2 80A Power steering control unit
SA3 80A Radiator fan control unit
SA4 80A Window regulator single fuse
Supply for the fuses: SC22, SC23, SC24, SC25, SC26, SC27 (for models with battery in luggage compartment only)
SA5 100A Auxiliary air heater control unit
SA6 50A Supply for the fuses: SC12, SC13, SC14, SC15, SC16, SC17, SC44, SC45 (for models with battery in luggage compartment only)
SA6 80A Window regulator single fuse
Supply for the fuses: SC12, SC13, SC14, SC15, SC16, SC17, SC22, SC23, SC24, SC25, SC26, SC27 (for models with battery in engine compartment only)
SA7 50A/80A Option for special vehicles

 

 

Main Fuse Box
 

It is in luggage compartment (rear right).

 

No Amps Function/component
1 5A Onboard supply control unit
2 125A Supply for main fuse box, electronics box high, relay and fuse carrier, electronics box high
3 80A Supply for main fuse box, electronics box high, relay and fuse carrier, electronics box high
4 30A 2005-2007: Amplifier for models with Bose sound system only
2005-2007: Supply for the fuses in the instrument panel: #12, 13, 14, 15, 16, 17, 19
2006-2007: Supply for the fuses in the instrument panel: #12, 13, 14, 15, 16, 17, 47

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