The first-generation Audi A4 and S4 (chassis codes B5/8D) , a pioneering luxury sedan and its high-performance variant, was produced from 1995 to 2001 . This iconic generation laid the foundation for Audi’s modern lineup, blending sophisticated design, cutting-edge engineering, and exceptional performance to redefine the mid-size luxury market.
In this detailed guide, you’ll find fuse box diagrams for Audi A4 and S4 models spanning 1995, 1996, 1997, 1998, 1999, 2000, and 2001 . These diagrams offer precise insights into the vehicle’s fuse layout and relay assignments, providing essential information for maintaining and troubleshooting your car’s electrical system.
What This Guide Covers:
Fuse Box Diagrams : Visual representation of the fuse panels for quick identification.Fuse Panel Locations : Clear instructions on where to find fuse boxes inside the car.Fuse Layout Assignments : Detailed descriptions of each fuse and relay, making it easier to pinpoint issues or perform upgrades.
Whether you’re a DIY enthusiast, a professional mechanic, or simply looking to maintain your Audi A4 or S4 (B5/8D), this resource is designed to help you navigate its electrical system with ease. From diagnosing electrical issues to ensuring optimal functionality of key components, this guide empowers you with the knowledge needed to keep your Audi running smoothly.
Optimize your car maintenance with this comprehensive look at the Audi A4/S4 (B5) fuse box diagrams!
The fuses are behind a cover on the driver’s side.
Assignment of the fuses in the instrument panel
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№ Description 1 Heated washer jets 2 Turn signals 3 Headlight washer system relay, lighting (glove box) for: engine compartment, air conditioner, 4-speed automatic gearbox, dash panel insert 4 Number plate lights 5 Dash panel insert, seat heating, bulb monitoring, catalytic converter, diesel lights, gearshift display, switch illumination, mirror switch and mirror motors, airbag warning light, ambient temperature indicator, air conditioner, rear window blind, parking aid, navigation system, telephone/ telematics 6 Central locking 7 ABS, brake light switch, clutch pedal switch 8 Telephone/telematics 9 Heated mirrors 10 Automatic headlight range control 11 Cruise control system (automatic gearbox) 12 Voltage supply – diagnosis 13 Brake lights 14 Interior lights, reading lights, anti-theft alarm system, make-up mirrors, seat adjustment memory 15 Dash panel insert, air conditioner, memory (seat adjustment/mlrrors), navigation system 16 ABS, electronic stability program 17 Heated lock cylinders, navigation system, selflevelling suspension, two-way radio, two-way radio for special vehicles 18 Main beam headlight, right 19 Main beam headlight, left 20 Dipped beam headlight, right; headlight range control 21 Dipped beam headlight, left; headlight range control 22 Tail and side lights, right 23 Tail and side lights, left 24 Windscreen wiper system, washer pump, intermittent wiper relay 25 Fresh air blower, air conditioner 26 Heated rear window, mirror heating, air recirculation 27 Rear window wiper, heated steering wheel with electronics 28 Fuel pump/diesel auxiliary pump 29 Engine management 30 Sliding roof 31 Reversing lights, cruise control system, automatic gearbox, rpm boost (V6 2.8L, 128 kW, 2V quattro 5HR180), automatic anti-dazzle interior mirror, EGR valve, diagnosis connector 32 Engine management 33 Cigarette lighter 34 Engine management 35 Trailer socket 36 Front fog lights and rear fog light 37 Radio sound systems 38 Luggage compartment light, central locking 39 Hazard warning lights 40 Horn 41 ABS 5.0 – hydraulic unit (valves) 42 Electronic stability program 43 EGR valve, coolant temperature sensor 44 Seat heating (power circuit)
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№ Description 1 – 2 Multi-function steering wheel control unit 3 Multi-function steering wheel control unit 4 Bulb monitoring control unit 5 Bulb monitoring control unit 6 Alarm system control unit (taxi) 7 Heated rear window relay 8 Daytime driving lights relay, alarm system control unit (taxi) 9 Headlight relay, alarm system control unit 10 Relay for glow plugs 11 Mirror control unit (with retraction function) 12 Mirror control unit (with retraction function) 13 Automatic gearbox relay 14-17 For police/taxi vehicles 18 –
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№ Description 1 Horn relay 2 Relief relay for X contact 3 – 4 Fuel pump relay, relay for glow plugs 5 Intermittent wash/wipe relay 6 Intermittent wash/wipe relay A – B – C –
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№ Description 1 Radiator fan relay (run-on) 2 Radiator fan relay (maximum speed) 3 Radiator fan relay (80W maximum speed), auxiliary water pump control unit 4 Relay for electronic stability program 5 Active door reflectors control unit 6 – 7 Relay for electronic stability program 8 – 14 Fuse for optional equipment 15 Seat adjustment fuse, front passenger’s side 16 Seat adjustment fuse, driver’s side 17 Repeller system fuse 18 ABS fuse 19 Radiator fan fuse 20 Radiator fan fuse 21 Radiator fan fuse (relay coil) 22 Rear window lifter fuse 23 Front window lifter fuse 24 Fuse for luggage compartment socket (Avant)
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№ Description 1 Relay 1 for heater elements (coolant) 2 Relay 2 for heater elements (coolant), secondary air pump relay 3 Diesel direct injection system relay, Motronic current supply relay 4 Auxiliary pump fuse 5 Fuse for engine electrics 6 – 7 Fuse 1 for glow plugs, secondary air pump fuse 8 Fuse 2 for glow plugs 9 Fuse for glow plugs – engine
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