1996–2003 Audi A3 and S3 (8L) Fuse Box Diagram
Fitting locations
1 - Relay carrier (3-pin) / fuse carrier
2 - Micro-central electrics
2 - Relay carrier (13-pin)
3 - Fuse holder
4 - Main fuse box / battery
Fuse box driver side dash panel
| No. | A | Description |
|---|---|---|
| 1 | 10 | Fuse in relay plate fuse holder
Left washer jet heater element 75x Right washer jet heater element Driver side heated exterior mirror Front passenger side heated exterior mirror |
| 2 | 10 | Front left turn signal bulb
Front right turn signal bulb Left side mounted turn signal bulb Right side repeater turn signal bulb |
| 3 | 5 | Illuminations:
Glove compartment light Operating and display unit for Climatronic air conditioning system |
| 4 | 5 | X-number plate light |
| 5 | 7.5 | Operating and display unit for Climatronic air conditioning system
Cruise control system switch Heated driver seat regulator Heated front passenger seat regulator Fresh air and air recirculation flap switch Operating unit in steering wheel (→July 2002) Temperature flap position switch High pressure sender Radiator fan control unit Navigation system with CD drive control unit Navigation operating electronics control unit Parking aid control unit Multifunction steering wheel control unit Radio Automatic anti-dazzle interior mirror |
| 6 | 5 | Driver side interior locking switch
Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system |
| 7 | 10 | Tiptronic switch
Speedometer sender Oil level and oil temperature sender Starter inhibitor and reversing light relay Left reversing light bulb Right reversing light bulb |
| 8 | 5 | Telephone and telematics control unit
Mobile telephone operating electronics control unit Telephone transmitter and receiver unit |
| 9 | 5 | Traction control system switch
Steering angle sender ABS control unit |
| 10 | 15 | Petrol engine (→November 2001):
Motronic control unit Motronic current supply relay Current supply relay for Simos control unit |
| 5 | Diesel engine (→November 2001):
Diesel direct injection system control unit |
|
| 10 | November 2001→:
Control unit in dash panel insert Navigation operating electronics control unit Radio Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system |
|
| 11 | 5 | Oil level and oil temperature sender
Fuel pump relay Control unit in dash panel insert Alternator warning lamp Handbrake warning lamp Glow period warning lamp Electronic power control fault lamp Engine electronics warning lamp Selector lever lock solenoid Left headlight range control motor Right headlight range control motor |
| 12 | 7.5 | Navigation system with CD drive control unit
Mobile telephone operating electronics control unit Telephone and telematics control unit Telephone transmitter and receiver unit Aerial amplifier for mobile telephone 16-pin connector, black, shelf centre console (diagnostic connector) |
| 13 | 10 | Left brake light bulb
Right brake light bulb High-level brake light bulb |
| 14 | 10 | Door warning lamps control unit
Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system Front interior light Front passenger side illuminated vanity mirror Driver side illuminated vanity mirror |
| 15 | 5 | Operating and display unit for Climatronic air conditioning system
Steering angle sender Automatic gearbox control unit Control unit in dash panel insert |
| 16 | 10 | Radiator fan control unit |
| 17 | 7.5 | Left lock cylinder heater element
Right lock cylinder heater element |
| 18 | 10 | Right headlight twin filament bulb (main beam)
Main beam warning lamp |
| 19 | 10 | Left headlight twin filament bulb (main beam) |
| 20 | 15 | Headlight range control regulator
Rear bulb monitoring device Right gas discharge light control unit Right headlight twin filament bulb (dipped beam) Left headlight range control motor Right headlight range control motor |
| 21 | 15 | Rear bulb monitoring device
Left gas discharge light control unit Left headlight twin filament bulb (dipped beam) |
| 22 | 5 | Control unit in dash panel insert
Right tail light bulb Right side light bulb |
| 23 | 5 | Control unit in dash panel insert
Left side light bulb Left tail light bulb |
| 24 | 20 | Automatic intermittent wash and wipe relay |
| 25 | 25 | Operating and display unit for air conditioning system/Climatronic
Fresh air blower |
| 26 | 25 | Heated rear window |
| 27 | 15 | Rear window wiper and washer relay
Rear window wiper motor |
| 28 | 15 | Audi A3: Fuel pump relay |
| 20 | Audi S3: Fuel pump relay | |
| 29 | 15 | Petrol engine:
Motronic control unit Motronic current supply relay Simos control unit Current supply relay for Simos control unit Output stage |
| 5 | Diesel engine (→2002):
Diesel direct injection system control unit |
|
| 10 | Diesel engine (2002→):
Diesel direct injection system control unit |
|
| 30 | 20 | Sliding sunroof adjustment control unit |
| 31 | 20 | Automatic gearbox control unit
Brake servo control unit |
| 5 | Four-wheel drive control unit | |
| 32 | 10 | Petrol engine:
Injector, cylinder 1 Injector, cylinder 2 Injector, cylinder 3 Injector, cylinder 4 |
| 30 | Diesel engine:
Diesel direct injection system control unit |
|
| 33 | 20 | Automatic intermittent wash and wipe relay |
| 34 | 10 | Petrol engine:
Charge pressure control solenoid valve Heater element for crankcase breather Secondary air inlet valve Variable intake manifold change-over valve Turbocharger air recirculation valve Inlet camshaft control valve 1 |
| 10 | Diesel engine:
Air mass meter Needle lift sender Exhaust gas recirculation valve Charge pressure control solenoid valve Variable intake manifold flap change-over valve |
|
| 35 | 30 | Trailer socket |
| 36 | 15 | Rear left fog light bulb
Left fog light bulb Right fog light bulb |
| 37 | 10 | →November 2001:
Control unit in dash panel insert Navigation operating electronics control unit Radio Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system |
| 20 | Petrol engine (November 2001→):
Motronic control unit Motronic current supply relay Current supply relay for Simos control unit |
|
| 5 | Diesel engine:
Diesel direct injection system control unit |
|
| 38 | 10 | Driver side interior locking switch
Release button for rear lid lock cylinder Ultrasonic sensor control unit Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system |
| 39 | 15 | Hazard warning lights system :
Front left turn signal bulb Front right turn signal bulb Rear left turn signal bulb Rear right turn signal bulb Left side mounted turn signal bulb Right side mounted turn signal bulb Left turn signal warning lamp Right turn signal warning lamp |
| 40 | 20 | Treble tone horn
Bass tone horn |
| 41 | 15 | Cigarette lighter |
| 42 | 15 | Navigation system tuner for TV
Aerial selection control unit Radio Amplifier Amplifier with bass loudspeaker, on left in luggage compartment Navigation system interface |
| 43 | 10 | Petrol engine:
Air mass meter Active charcoal filter system solenoid valve 1 Lambda probe heater Lambda probe 1 heater after catalytic converter |
| 10 | Diesel engine:
Clutch pedal switch Brake pedal switch Heater element for crankcase breather Low heat output relay High heat output relay |
|
| 44 | 15 | Heated cushion for driver seat
Heated backrest for driver seat |
Relay carrier (3-pin) / fuse carrier
| Relay | ||
|---|---|---|
| 1 | Petrol: Secondary air pump | |
| Diesel: High heat output | ||
| 2 | Petrol (Motronic): Motronic current supply | |
| Petrol (Simos): Current supply relay for Simos control unit | ||
| Diesel: Low heat output relay | ||
| No. | A | Description |
| 3 | 20 | Petrol (→2003): Brake vacuum pump fuse |
| 4 | 40 | Petrol (→2002): Special vehicle fuse 20 |
Micro-central electrics
| No. | Description |
|---|---|
| 1 | Dual tone horn |
| 2 | X-contact relief |
| 3 | Vacant |
| 4 | Petrol: Fuel pump |
| Diesel: Glow plug | |
| 5 | Automatic intermittent wash and wipe |
| 6 | Automatic intermittent wash and wipe |
| Fuses | |
| A | Driver seat adjustment thermal fuse 1
Driver seat adjustment thermal fuse 2 |
| B | 2003: Brake vacuum pump fuse |
| C | Window regulator single fuse |
Relay carrier (13-pin)
| No. | Description |
|---|---|
| 1 | Vacant |
| 2 | Rear bulb monitoring device |
| 3 | Rear bulb monitoring device |
| 4 | Open window regulator relay, front passenger side |
| 5 | Folding exterior mirror control unit |
| 6 | Folding exterior mirror control unit |
| 7 | Brake light suppression |
| 8 | Heated rear window |
| 9 | Quattro: Fuel pump |
| 10 | except Quattro: Fuel pump |
| 11 | Starter inhibitor and reversing light |
| 12 | Diesel: Diesel direct injection system |
| 13 | Radiator fan run-on |
| Coolant pump control unit | |
| Fuses | |
| 14 | Vacant |
| 15 | Vacant |
| 16 | Vacant |
| 17 | Window regulator thermal fuse |
| 18 | July 2002→: Multifunction steering wheel fuse |
Main fuse box
| No. | A | Description |
|---|---|---|
| S131 | 50 | Diesel: Heater glow plugs |
| S132 | 50 | Engine management |
| S133 | 30 | Radiator fan |
| S134 | 110 | Interior |
| S138 | 150 | Alternator |
| S162 | 30 | Fuse 1 (30) in fuse holder on battery |