The second-generation Audi A8 and S8 (chassis codes D3/4E) , Audi’s flagship luxury sedan and its high-performance variant, was produced in 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 to 2010 . Known for its innovative aluminum construction, advanced technology, and luxurious interior, this generation of the A8 and S8 set a new standard in the executive sedan segment.
In this article, you will find detailed fuse box diagrams for Audi A8 and S8 models produced between 2002 and 2010 . These diagrams provide crucial insights into the vehicle’s electrical systems, helping owners and technicians understand the assignment of each fuse (fuse layout). This information is indispensable for diagnosing electrical issues, performing routine maintenance, or making necessary repairs.
This guide is a valuable resource for understanding the electrical system of the second-generation Audi A8 and S8, equipping owners with the knowledge needed to maintain the functionality, reliability, and performance of these premium luxury sedans.
In the cabin, there are two fuse blocks at the front left and right of the cockpit.
There are also two fuse blocks here – on the left and right of the trunk.
Assignment of the fuses on the left side of the dashboard
№ Description Amps 1 Garage door opener (HomeUnk) 5 2 Parking assist system 5 3 Parking assist system 5 4 Headlight range control/light control device 10 5 Instrument cluster 5 6 Steering column electronics system control 10 7 Diagnostic connector 5 8 Diagnostic connector/oil level sensor 5 9 ESP control unit/steering angle sensor 5 10 Instrument cluster 5 11 Audi lane assist 10 12 Brake light switch 5 13 Telephone/cell phone 10 14 Not Used 15 Access/start control module 5 16 RSE system 10 17 Adaptive Cruise Control 5 18 Heated washer jets 5 19 Not Used 20 Tire pressure monitoring system 5 21 Not Used 22 Brake light switch 5 23 Cell phone preparation 5 24 Horn 15 25 Windshield wiper system 40 26 Not Used 27 Electronic Stabilization Program (ESP) 25 28 Not Used 29 Switch illumination 1 30 Not Used 31 Onboard power supply, light control (right headlight) 30 32 Not Used 33 Left rear footwell heater 25 34 Not Used 35 Not Used 36 Audi side assist 5 37 Cooler 15 38 Onboard power supply, light control (left headlight) 30 39 Door control unit, driver’s side 7.5 40 Power steering column adjustment 25 41 Door control unit, rear left 7.5 42 Access/start control module 25 43 Adaptive Light, left 10 44 Adaptive Light, right 10
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Assignment of the fuses on the right side of the dashboard
№ Description Amps 1 Parking brake 5 2 Air conditioning 10 3 Shift gate 5 4 Not Used 5 Engine control 15 6 Oxygen sensor before the three-way catalytic converter 15 7 Oxygen sensor behind the three-way catalytic converter 15 8 Engine control, auxiliary water pump 10 9 Climate control front/rear, dash panel buttons 5 10 Suspension level control system (Adaptive Air Suspension) 10 11 Light and rain sensor 5 12 Display-/control unit 5 13 Roof electronics control unit 10 14 CD/DVD drive 5 15 Energy management 5 16 Not Used 17 Radiator fan electronics 5 18 Airbag front passenger recognition (weight sensor) 5 19 Not Used 20 Heated/ventilated seats 5 21 Engine control module 5 22 Not Used 23 Parking brake (switch) 5 24 Vehicle electrical system 10 25 Automatic transmission 15 26 Air conditioning water valves water pump, rear climate control 10 27 Sunroof 20 28 Engine control module 5 29 Fuel injectors 15 30 Ignition coils 30 31 Fuel pump, right/fuel pump electronics 20/40 32 Automatic transmission 5 33 Right rearfootwell heater 25 34 Heated/ventilated seats, rear 20 35 Heated/ventilated seats, front 20 36 Cigarette lighter, front 20 37 Cigarette lighter, rear/socket, rear 20/25 38 Auxiliary cooler fan 20 39 Door control unit, front right 7.5 40 Brake booster 15 41 Door control unit, rear right 7.5 42 Not Used 43 Headlight washer system 30 44 Air conditioning heater fan 30
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Assignment of the fuses on the left side of the trunk
№ Description Amps 1 Not Used 2 Not Used 3 Not Used 4 Not Used 5 Digital sound system control module 30 6 Navigation 5 7 TV Tuner 10 8 Rear-view camera 5 9 Communications box 5 10 Subwoofer in rear window shelf (BOSE)/ Amplifier (Bang & Olufsen) 15/30 11 Socket 20 12 Not Used
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Assignment of the fuses on the right side of the trunk
№ Descriptiob Amps 1 Not Used 2 Fuel pump, left 20 3 Not Used 4 Not Used 5 Central control module for comfort system (left light) 20 6 Central control module for comfort system (left light) 10 7 Central control module for comfort system (door closing) 20 8 Electronic parking brake control module, left 30 9 Electronic parking brake control module, right 30 10 Not Used 11 Not Used 12 Not Used
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