Audi A4 B7 (8E, 8H) (2004-2008) – fuse box diagram
Year of production: 2004, 2005, 2006, 2007, 2008, 2009.
Cigarette lighter fuse (power socket) in Audi A4 B7 (2004-2009). is fuse 33 in the fuse box in the passenger compartment.
The fuse box in the passenger compartment
Location of the fuse box
Audi A4 B7 fuse box is located on the left side of the dashboard:
To access it, open the left side door and remove the dashboard side cover by pressing it.
Fuse box diagram
| No. | Amps [A] | Description |
|---|---|---|
| 1 | 10 A | Air conditioning controller;
Climatronic. |
| 2 | 5A | Footlights |
| 3 | 5A | Heated windshield washer nozzles |
| 4 | 5A | Cooling fan control unit |
| 5 | 10 A | Rear roller shutter;
Multifunction switch; Oil level sensor; Oil temperature sensor; Navigation system; Park assist controller. |
| 6 | 5A | Air quality sensor;
Climatronic; Heated front seats; Air conditioning high pressure sensor; TCS/ESP button, |
| 7 | 10 A | Traction control switch;
Clutch switch; ABS controller; Brake pedal switch. |
| 8 | 5A | Phone;
Telephone amplifier. |
| 9 | 15A | Brake servo relay |
| 10 | 5A | Headlight range control |
| 11 | 5A | Airbag control unit;
Airbag warning light. |
| 12 | 10 A | Diagnostic connector |
| 13 | 10 A | Control unit, steering column electronics |
| 14 | 10 A | Brake light switch |
| 15 | 10 A | Control unit with display in dashboard insert;
Navigation system; CD player. |
| 16 | 5A | Garage door opener |
| 17 | 10 A | Rain sensor;
Daytime running system; Park assist controller. |
| 18 | 5A | |
| 19 | 15A | Fog lights |
| 20 | Unused | |
| 21 | Unused | |
| 22 | 15A | Left front door controller;
Front right door controller. |
| 23 | 15A | Left rear door controller;
Right rear door controller. |
| 24 | 20A | Comfort system electrics |
| 25 | 30A | Blower;
Air conditioning. |
| 26 | 30A | Heated rear window |
| 27 | 30A | Trailer detection control unit |
| 28 | 20A | Fuel pump |
| 29 | Unused | |
| 30 | 20A | Sliding roof controller |
| 31 | 15A | Reversing light switch;
Mass flow meter; Automatic transmission controller; Light sensor; Starter relay; Selector handle lock solenoid; Diagnostic connector; Automatic anti-glare rear view mirror. |
| 32 | Unused | |
| 33 | 15A | Lighter |
| 34 | 30A | 12V socket |
| 35 | 30A | Accessory socket |
| 36 | 30A | Power control unit;
Rear wiper motor. |
| 37 | 30A | Power Controller;
Headlight washer pump. |
| 38 | 15A | Alarm horn;
Comfort system electrics; Interior monitoring |
| 39 | 20A | Radio sound amplifier |
| 40 | 25A | Horn |
| 41 | Additional heater control unit;
Remote control receiver. |
|
| 42 | 30A | ABS control unit |
| 43 | 15A | Air mass flow meter;
Engine management; EGR; Main Relay; Engine control unit; Engine control unit relay. |
| 44 | 30A | Climate control unit |
Fuse and relay box №1.
Fuse box diagram.
legend.
| No. | Amps [A] | Description |
|---|---|---|
| A | Unused | |
| b | 40A | Additional heater |
| C | 60A | Additional heater |
| R1 | Special Vehicles | |
| R2 | Low power heating relay | |
| R3 | High-performance heating relay |
Fuse and relay box 2 in the passenger compartment
Fuse box diagram
| No. | Amps [A] | Description |
|---|---|---|
| A | 10 A | Rear roller shutter |
| B1 | 10 A | 12V socket |
| B2 | 10 A | Rear roller shutter |
| C | unused | |
| D | 30A | Window regulator |
| E1 | 30A | Driver’s seat adjustment |
| E2 | 10 A | Driver’s seat adjustment |
| F | 30A | Window regulator |
| g | 30A | Trailer towing module |
| R1 | Fuel pump relay;
Additional fuel pump relay. |
|
| R2 | Servotronic control unit | |
| R3 | Starter motor relay | |
| R4 | Starter motor relay;
Brake servo relay. |
|
| R5 | Heated rear window relay | |
| R6 | X relay relieving contact | |
| R7 | Unused | |
| R8 | Horn relay | |
| R9 | Unused |
Fuse and relay box 3 in the passenger compartment
Diagram of the fuse box
| No. | Amps [A] | Description |
|---|---|---|
| A | Unused | |
| B | 10 A | Pest repellent system |
| C | Unused | |
| D | Unused | |
| E | 40A | Special Vehicles |
| F1 | 10 A | Special Vehicles |
| F2 | 40A | Cooling fan (also 60A) |
| G | 30A | Cooling fan (also used 40A and 60A) |
| H | 40A | ABS control unit |
| R1 | Unused | |
| R2 | Unused | |
| R3 | Special Vehicles | |
| R4A | Special Vehicles | |
| R4B | Cab package |
Relay box in the passenger compartment
Relay box diagram
| No. | Amps [A] | DESCRIPTION |
|---|---|---|
| A | Unused | |
| B | Unused | |
| B1 | Unused | |
| B2 | Unused | |
| R1 | Alarm system;
Traffic lights; High beam relay. |
|
| R2 | Special Vehicles;
Cab Package. |
|
| R3 | Alarm system control unit or siren relay |
|
| R4 | Alarm system control unit or siren relay |
|
| R5 | Alarm relay;
Right turn signal |
|
| R6 | Alarm relay Left turn signal or Unused |
Fuse box 2 in the passenger compartment
Diagram of the fuse box
| No. | Amps [A] | Description |
|---|---|---|
| 1 | 10 A | Special Vehicles or Cab package |
| 2 | 25A | Special Vehicles or alarm system |
| 3 | 10 A | Special Vehicles or Cab package |
| 4 | Special Vehicles | |
| 5 | Special Vehicles | |
| 6 | Special vehicles | |
| 7 | Special Vehicles | |
| 8 | Special Vehicles | |
| 9 | 5A | Special Vehicles or radio |
| 10 | 10 A | Special Vehicles or 12V socket |
Audi A4 (B7) engine compartment fuse box
Fuse box diagram
| No. | Amps [A] | Description |
|---|---|---|
| A | 15A | Engine electronics |
| B1 | Unused | |
| B2 | 40A | Secondary air injection pump |
| C | Unused | |
| D | 20A | Engine control unit |
| E | 15A | Injectors |
| F | Unused | |
| G | 15A | Engine electronics |
| R1a | Unused | |
| R1b | Unused | |
| R2 | Main relay | |
| R3 | Secondary air pump relay | |
| R4 | Unused |
This is applicable for engine models:
2004, 2005, 2006, 2007 and 2008 Audi A4 B7 Gasoline (1.6, 1.8T, 2.0, 3.2) and Diesel (1.9 TDI, 2.5 TDI, 2.7 TDI and 3.0 TDI), S4, RS4.