Table of Contents
The Audi A8 is a luxury vehicle manufactured by Audi AG in Neckarsulm, Germany, serving as the successor to the Audi V8. In this article, we provide a detailed overview of the fuse box diagrams for the second-generation Audi A8 (D3/4E), covering the model years 2002, 2003, 2004, 2005, 2006, 2007, 2008, and 2009.
Here, you will find the locations and diagrams of the power distribution centers. Additionally, we specifically highlight the fuses responsible for the fuel pump and the 12-volt power receptacles (cigarette lighters).
Engine Compartment
The power distribution center is located in the center of the engine compartment, beneath the plenum chamber cover.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Unused | |
| 2 | Secondary air injection pump | 50/60/80 |
| or | ||
| Glow plugs | ||
| 3 | Secondary air injection pump | 50/60/80 |
| or | ||
| Glow plugs | ||
| 4 | Unused | |
| 5 | ||
| 6 | ||
| 7 | ||
| R1 | Glow plug relay | |
| Secondary air injection pump relay | ||
| R2 |
|
|
| R3 |
|
|
| R4 | Unused | |
Passenger Compartment
This area contains two fuse panels and two relay boards.
Fuse Panel 1
Located on the driver’s side, at the end of the dashboard behind the side trim panel.
General view.
| Diagram of Fuse Panel 1 (Driver’s Side) | ||
|---|---|---|
|
||
| No. | A | Description |
| 1 | 5 | Garage door opener (HomeLink) |
| 2 | 5 | Parking aid (Acoustic Parking System) |
| 3 | 5 | |
| 4 | 10 | Automatic headlight range control |
| 5 | 5 | Instrument cluster |
| 6 | 10 | Steering column electronics control module |
| 7 | 5 | On-Board Diagnostics (OBD-II) port |
| 8 | 5 | |
| 9 | 5 | Electronic Stability Program (ESP) |
| 10 | 5 | Instrument cluster |
| 11 | - | Unused |
| 12 | 5 | Brake light switch |
| 13 | 10 | Telephone module |
| 14 | - | Unused |
| 15 | 5 | Driver identification system control module |
| 16 | - | Unused |
| 17 | 5 | Adaptive Cruise Control (ACC) |
| 18 | 5 | Heated windshield washer nozzles |
| 19 | - | Unused |
| 20 | 5 | Tire Pressure Monitoring System (TPMS) |
| 21 | - | Unused |
| 22 | 5 | Brake light switch |
| 23 | 5 | Electronic toll collection system (Telepass) |
| 24 | 15 | Horn |
| 25 | 40 | Windshield wipers |
| 26 | - | Unused |
| 27 | 25 | Electronic Stability Program (ESP) |
| 28 | - | Unused |
| 29 | 10 | Light switch module |
| 30 | - | Unused |
| 31 | 30 | Vehicle electrical system control module (front right lighting) |
| 32 | - | Unused |
| 33 | 25 | Auxiliary heater (rear left) |
| 34 | - | Unused |
| 35 | - | Unused |
| 36 | - | Unused |
| 37 | - | Unused |
| 38 | 30 | Vehicle electrical system control module (front left lighting) |
| 39 | 7.5 | Front left door control module |
| 40 | 25 | Power steering column adjustment |
| 41 | 7.5 | Rear left door control module |
| 42 | 25 | Access and Start Authorization control module |
| 43 | - | Unused |
| 44 | - | Unused |
Fuse Panel 2
Located on the passenger side, at the end of the dashboard behind the side trim panel.
| Fuse Assignment (Passenger Side) | ||
|---|---|---|
|
||
| No. | A | Description |
| 1 | 5 | Electromechanical Parking Brake (EPB) |
| 2 | 10 | Climate control system |
| 3 | 5 | Gear selector, P/N lock |
| 4 | 15 | Automatic transmission (Multitronic) |
| 5 | 15 | Engine control module (ECM) |
| 6 | 15 | Oxygen (O2) sensors |
| 7 | 15/10 | Oxygen (O2) sensors / High-pressure valve |
| 8 | 10 | Engine control module, auxiliary coolant pump |
| 9 | 5 | Climate control system, instrument panel switches |
| 10 | 10 | Adaptive air suspension |
| 11 | 5 | Light/rain sensor |
| 12 | 5 | Front display and control module (MMI) |
| 13 | 10 | Overhead electronics module |
| 14 | 5 | Front media player (CD/DVD drive) |
| 15 | 5 | Battery Energy Management (BEM) system |
| 16 | 5 | Crankcase ventilation heater |
| 17 | 5 | Coolant control valve electronics |
| 18 | - | Unused |
| 19 | 5 | Mass Air Flow (MAF) sensor (Diesel) |
| 20 | 5 | Climate-controlled seats |
| 21 | 5/15 | Engine control module (ECM) (Gasoline/Diesel) |
| 22 | 10 | Fuel cooling system |
| 23 | 5 | Electromechanical Parking Brake (EPB) |
| 24 | 10 | Vehicle electrical system control module 2 |
| 25 | 15 | Automatic transmission |
| 26 | 10 | Coolant pump / A/C valves, rear climate control panel |
| 27 | 20 | Sunroof control module |
| 28 | 5 | Engine control module (ECM) |
| 29 | 15 | Fuel injectors |
| 30 | 30 | Ignition coils |
| 31 | 20/40 | Right fuel pump / Fuel pump control module (Gasoline) |
| 32 | 5/10 | Automatic transmission / Multitronic |
| 33 | 25 | Auxiliary heater (rear right footwell) |
| 34 | 20 | Heated/ventilated rear seats |
| 35 | 20 | Heated/ventilated front seats |
| 36 | 20 | Front cigarette lighter |
| 37 | 20/30 | Rear cigarette lighter and 12V power receptacles |
| 38 | 20 | Auxiliary radiator cooling fan |
| 39 | 7.5 | Front right door control module |
| 40 | 15 | Brake booster vacuum pump |
| 41 | 7.5 | Rear right door control module |
| 42 | 20 | Auxiliary heater |
| 43 | 30 | Headlight washer system |
| 44 | 30 | HVAC blower motor |
Relay Board 1
Located beneath the floor trim in the front passenger footwell.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| R1 |
|
|
| R2 | Starter relay | |
| R3 | ||
| R4 | Fuel pump relay | |
| or | ||
| Power supply relay | ||
| R5 | Headlight washer pump relay | |
| 1 | Front right power window regulator | 30 |
| or | ||
| Unused | ||
| 2 | Power seat adjustment | 30 |
| 3 | HVAC blower motor | 30 |
| or | ||
| Front right power window regulator | ||
| or | ||
| Unused | ||
| 4 | Power seat adjustment | 30 |
| 5 | Unused | |
| 6 | ||
Relay Board 2
Located beneath the floor trim in the driver’s footwell.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | ABS control module | 60 |
| 2 | Adaptive air suspension | 40 |
| 3 | Power window regulator | 30/40 |
| 4 | Power seat adjustment | 30 |
| 5 | 30 | |
| 6 | Unused | |
| 7 | Unused | |
| 8 | Unused | |
| R1 | Adaptive air suspension compressor relay | |
| R2 | Horn relay | |
| R3 | Terminal 15 power supply relay | |
| R4 | Heated washer nozzle relay | |
| R5 | Alarm system / Security control module (Taxi version) | |
| R6 | Terminal 75 power supply relay | |
| R7 | Unused | |
| R8 | Unused | |
| R9 | Unused | |
| R10 | Unused | |
Luggage Compartment
This area contains two electrical centers.
Fuse Panel 1
Fuse panel 1 is located on the right side, behind the interior trim.
Access panel removed.
General view.
| Diagram | ||
|---|---|---|
|
||
| No. | A | Description |
| 1 | 20 | Right fuel pump (Diesel) |
| 2 | 20 | Left fuel pump (Gasoline / Diesel) |
| 3 | 15 | Trailer towing socket |
| 4 | - | Unused |
| 5 | 20 | Rear comfort system control module (left taillight) |
| 6 | 10 | Rear comfort system control module (right taillight) |
| 7 | 20 | Rear comfort system control module (power trunk/tailgate assist) |
| 8 | 30 | Electromechanical Parking Brake (EPB), left actuator |
| 9 | 30 | Electromechanical Parking Brake (EPB), right actuator |
| 10 | 15 | Trailer control module (left lighting) |
| 11 | 15 | Trailer control module (right lighting) |
| 12 | 10 | Trailer control module |
| A | 40 | Rear window defogger |
| B | 30/40 | Power rear seat adjustment |
| or | ||
| Fuel pump (Gasoline) | ||
| C | 30 | Power rear seat adjustment |
| D | 15 | Infotainment / Communication system |
| or | ||
| Unused | ||
| R1 | Rear window defogger relay | |
| R2 | Power supply relay | |
| R3 | Fuel pump relay | |
| 1 | 150 | Main power supply |
| 2 | 60 | Radio module |
| Navigation system module | ||
| TV tuner module | ||
| 3 | 110 | Rear window defogger |
Fuse Panel 2
The second fuse panel is located on the left side.
General view.
| Diagram | ||
|---|---|---|
|
||
| No. | A | Description |
| 1 | - | Unused |
| 2 | - | Unused |
| 3 | - | Unused |
| 4 | - | Unused |
| 5 | 30 | DSP audio amplifier |
| 6 | 5 | Navigation module |
| 7 | 10 | TV tuner |
| 8 | - | Unused |
| 9 | 5 | Communication module |
| 10 | 15 | Telephone loudspeaker (rear parcel shelf) |
| 11 | 20 | 12V power receptacle |
| 12 | 5 | Auxiliary heater remote control receiver |
i have a 2009 audi A8L d3 and im trying to find the fuse for the back up assistance camera. being that its a rear component id figure it would be in the luggage are fuse box but not sure which one as i haven't found a diagram with that fuse location. could you possibly help me with this
Engine bay image is for the climate controls air filter not relays and fuses
El cuadro de velocidad, revoluciones, se escucha un clip clip pero no funciona