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In this article, we consider the first-generation Audi A3 / S3 (8L), produced from 1996 to 2003. Here you will find fuse box diagrams of Audi A3 and S3 1997, 1998, 1999, 2000, 2001, and 2002, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.
Fuse Layout Audi A3 / S3 1997-2003
Table of Contents
Instrument Panel Fuse Box
Instrument Panel Fuse Box
Fuse Box Location
The fuses are behind a cover on the driver’s side.
Fuse Box Diagram
| № | Amps | Function/component |
|---|---|---|
| 1 | 20A | Left washer jet heater element Right washer jet heater element Driver side heated exterior mirror Front passenger side heated exterior mirror |
| 2 | 10A | Front left turn signal bulb Front right turn signal bulb Left side mounted turn signal bulb Right side repeater turn signal bulb |
| 3 | 5A | Illuminations: Glove compartment light, Operating and display unit for Climatronic air conditioning system |
| 4 | 5A | Number plate light |
| 5 | 7.5A | 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 (up to 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 Electric mirror adjustment |
| 6 | 5A | Driver side interior locking switch Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system |
| 7 | 10A | 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 | 5A | Telephone and telematics control unit Mobile telephone operating electronics control unit Telephone transmitter and receiver unit |
| 9 | 5A | Traction control system switch Steering angle sender ABS control unit |
| 10 | 15A | Engine management petrol engine (up to 2001): Motronic control unit Motronic current supply relay Current supply relay for Simos control unit |
| 10 | 5A | Engine management diesel engine (up to 2001): Diesel direct injection system control unit |
| 10 | 10A | From 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 | 5A | 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 | 7.5A | Up to 2001: Voltage supply - diagnosis From 2001: 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 T16 - 16-pin connector, black, shelf centre console (diagnostic connector) |
| 13 | 10A | Left brake light bulb Right brake light bulb High-level brake light bulb |
| 14 | 10A | 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 | 5A | Operating and display unit for Climatronic air conditioning system Steering angle sender Automatic gearbox control unit Control unit in dash panel insert |
| 16 | 10A | Radiator fan control unit |
| 17 | 7.5A | Left lock cylinder heater element Right lock cylinder heater element |
| 18 | 10A | Right headlight twin filament bulb (main beam) Main beam warning lamp |
| 19 | 10A | Left headlight twin filament bulb (main beam) |
| 20 | 15A | 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 | 15A | Rear bulb monitoring device Left gas discharge light control unit Left headlight twin filament bulb (dipped beam) |
| 22 | 5A | Control unit in dash panel insert Right tail light bulb Right side light bulb |
| 23 | 5A | Control unit in dash panel insert Left side light bulb Left tail light bulb |
| 24 | 20A | Automatic intermittent wash and wipe relay |
| 25 | 25A | Operating and display unit for air conditioning system/Climatronic Fresh air blower |
| 26 | 25A | Heated rear window |
| 27 | 15A | Rear window wiper and washer relay Rear window wiper motor |
| 28 | 15A/20A | Fuel pump relay |
| 29 | 15A | Engine management petrol engine: Motronic control unit Motronic current supply relay Simos control unit Current supply relay for Simos control unit Output stage |
| 29 | 5A/10A | Engine management diesel engine: Diesel direct injection system control unit |
| 30 | 20A | Sliding sunroof adjustment control unit |
| 31 | 20A | Automatic gearbox control unit Brake servo control unit |
| 31 | 5A | Four-wheel drive control unit |
| 32 | 10A | Engine management petrol engine: lnjector, cylinder 1~4 |
| 32 | 30A | Engine management diesel engine: Diesel direct injection system control unit |
| 33 | 20A | Automatic intermittent wash and wipe relay |
| 34 | 10A | Engine management petrol engine: Charge pressure control solenoid valve Heater element for crankcase heather Secondary air inlet valve Variable intake manifold change-over valve Turbocharger air recirculation valve Inlet camshaft control valve 1 |
| 34 | 10A | Engine management 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 | 30A | Trailer socket |
| 36 | 15A | Rear left fog light bulb Left fog light bulb Right fog light bulb |
| 37 | 10A | Up to 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 |
| 37 | 20A | Engine management petrol engine (from 2001): Motronic control unit Motronic current supply relay Current supply relay for Simos control unit |
| 37 | 5A | Engine management diesel engine (from 2001): Diesel direct injection system control unit |
| 38 | 10A | 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 | 15A | 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 | 20A | Treble tone horn Bass tone horn |
| 41 | 15A | Cigarette lighter |
| 42 | 15A | Navigation system tuner for TV Aerial selection control unit Radio Amplifier Amplifier with bass loudspeaker, on left in luggage compartment Navigation system interface |
| 43 | 10A | Engine management petrol engine: Air mass meter Active charcoal filter system solenoid valve 1 Lambda probe heater Lambda probe 1 heater after catalytic converter |
| 43 | 10A | Engine management diesel engine: Clutch pedal switch Brake pedal switch Heater element for crankcase heather Low heat output relay High heat output relay |
| 44 | 15A | Heated cushion for driver seat Heated backrest for driver seat |
Relays
Two relay holders (micro-central electrics and 13-pin relay carrier) are located under the shelf on the driver’s side.
Micro-Central Electrics
| № | Description |
|---|---|
| A | Driver seat adjustment thermal fuse 1 Driver seat adjustment thermal fuse 2 |
| B | Brake vacuum pump fuse |
| C | Window regulator single fuse |
| 1 | Dual tone horn relay |
| 2 | X-contact relief relay |
| 3 | 1997-2000: Intermittent wash/wipe relay |
| 4 | Petrol: Fuel pump relay Diesel: Glow plug relay |
| 5 | 1997-2000: Diesel direct injection system relay 2001-2003: Automatic intermittent wash and wipe relay |
| 6 | 1997-2000: Fog light relay 2001-2003: Automatic intermittent wash and wipe relay |
13-Pin Relay Carrier
| № | Description |
|---|---|
| 1 | 1997-2000: Horn |
| 2 | Rear bulb monitoring device |
| 3 | Rear bulb monitoring device |
| 4 | 1997-2000: Control unit for mirror retraction 2001-2003: Open window regulator relay, front passenger side |
| 5 | 1997-2000: Control unit for mirror retraction 2001-2003: Folding exterior mirror control unit |
| 6 | 1997-2003: Telephone splitter relay 2001-2003: Folding exterior mirror control unit |
| 7 | 2001-2003: Brake light suppression relay |
| 8 | 2001-2003: Heated rear window relay |
| 9 | 2001-2003: Fuel pump relay (four-wheel drive) |
| 10 | 2001-2003: Fuel pump relay (front-wheel drive) |
| 11 | Starter inhibitor and reversing light relay |
| 12 | 1997-2000: Headlight washer system relay 2001-2003: Diesel direct injection system relay |
| 13 | Radiator fan run-on relay Coolant pump control unit |
| 14 | - |
| 15 | - |
| 16 | - |
| 17 | Window regulator thermal fuse (from 2000) |
| 18 | Multifunction steering wheel fuse (from 2002) |
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Engine Compartment Fuse Boxes
Engine Compartment Fuse Boxes
Fuse Box №1
The main fuse box is located on the battery.
| № | Description |
|---|---|
| S131 | Heater elements |
| S132 | Engine management |
| S133 | Radiator fan 2 |
| S134 | Vehicle interior |
| S138 | Alternator |
| S162 | ABS (pump) |
| S163 | ABS (valves) |
| S164 | Radiator fan |
Fuse Box №2
It is near brake master cylinder (front left, in plenum chamber).
| № | Amps | Description |
|---|---|---|
| 1 | Petrol: Secondary air pump relay Diesel: High heat output relay |
|
| 2 | Petrol: Motronic current supply relay Current supply relay for Simos control unit Diesel: Low heat output relay |
|
| 3 | 20A | Brake vacuum pump (up to 2003) |
| 4 | 20A/40A | Special vehicle fuse (up to 2002) |
| 5 | - | - |
| 6 | - | - |
| 7 | - | - |
| 8 | - | - |
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