Audi A4 2009 Fuse Box Info
Passenger compartment fuse box location:
The instrument panel fuse box is located on the end of the instrument panel on the driver’s side of the vehicle.
The instrument panel fuse box is located on the end of the instrument panel on the passenger’s side of the vehicle.
Luggage compartment fuse box location:
The luggage compartment fuse box is located on the right side of the trunk, behind a cover.
Fuse Box Diagram | Layout
Passenger compartment fuse box (Left Side):
| Fuse/Relay N° | Rating | Functions |
| Fuse panel (black) | ||
| 1 | - | Not used |
| 2 | 5A | Clutch sensor |
| 3 | 5A | Garage door opener |
| 4 | 10A | Directional Stabilization Assistance control module |
| 5 | 5A | Air conditioner |
| 6 | 5A | Autom. headlight range control, right |
| 7 | 5A | Autom. headlight range control, left |
| 8 | 5A | Vehicle electrical system control module |
| 9 | 5A | Interior mirror |
| 10 | 5A | Gearshift gate |
| 11 | 5A | Heated washer jets |
| 12 | 5A | Air conditioner |
| Fuse panel (brown) | ||
| 1 | - | Not used |
| 2 | 5A | Clutch sensor |
| 3 | 25A | Fuel pump |
| 4 | 5A | Auxiliary water pump |
| 5 | 30A | Front seat heating |
| 6 | 10A | Electronic stabilization program (ESP) |
| 7 | 25A | Horn |
| 8 | 30A | Window lifter engine for door, left |
| 9 | 30A | Wiper and washer system |
| 10 | 25A | Electronic stabilization program (ESP) |
| 11 | 15A | Door, left |
| 12 | 5A | Rain sensor, light sensor |
| Fuse panel (red) | ||
| 1 | - | Not used |
| 2 | - | Not used |
| 3 | 10A | Lumbar support |
| 4 | - | Not used |
| 5 | - | Not used |
| 6 | 35A | Vehicle electrical system control module |
| 7 | 20A | Vehicle electrical system control module |
| 8 | 30A | Vehicle electrical system control module |
| 9 | 20A | Sun roof |
| 10 | 30A | Vehicle electrical system control module |
| 11 | - | Not used |
| 12 | 5A | Alarm system |
Passenger compartment fuse box (Right Side):
| Fuse/Relay N° | Rating | Functions |
| Fuse panel (black) | ||
| 1 | - | Not used |
| 2 | - | Not used |
| 3 | - | Not used |
| 4 | - | Not used |
| 5 | 5A | Steering column switch module |
| 6 | 5A | Electronic Stabilization Program (ESP) |
| 7 | 5A | Diagnostic connector, Terminal 15 |
| 8 | 5A | Data bus on board diagnostic interface |
| 9 | - | Not used |
| 10 | - | Not used |
| 11 | - | Not used |
| 12 | - | Not used |
| Fuse panel (brown) | ||
| 1 | 5A | CD charger |
| 2 | - | Not used |
| 3 | 5/20A | MMI/Radio |
| 4 | 5A | Light switch |
| 5 | 5A | Data bus on board diagnostic interface, Instrument cluster |
| 6 | 5A | Ignition lock |
| 7 | - | Not used |
| 8 | 40A | Air conditioner blower |
| 9 | 5A | Steering column lock |
| 10 | 10A | Air conditioner |
| 11 | 10A | Diagnostic connector, Terminal 30 |
| 12 | 5A | Steering column switch module |
Luggage compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| Fuse panel (black) | ||
| 1 | 5A | Tire pressure monitoring system |
| 2 | 15A | Trailer towing |
| 3 | 20A | Trailer towing |
| 4 | 20A | Trailer towing |
| 5 | 5A | Electrmechanical parking brake |
| 6 | 15A | Electronic dumping control |
| 7 | 30A | Electromechanical parking brake |
| 8 | 30A | Comfort system central control module |
| 9 | - | Not used |
| 10 | 30A | Comfort system central control module |
| 11 | 20A | Comfort system central control module |
| 12 | - | Not used |
| Fuse panel (brown) | ||
| 1 | 15A | Converter with socket |
| 2 | - | Not used |
| 3 | 7.5A | MMI/Radio |
| 4 | 30A | Digital sound system |
| 5 | 5/7.5A | Front information display |
| 6 | - | Not used |
| 7 | 30A | Electromechanical parking brake |
| 8 | 30A | Rear seat heating |
| 9 | 30A | Window lifter engine for door, right |
| 10 | - | Not used |
| 11 | 15A | Door, right |
| 12 | 5A | Rear view camera |
| Fuse panel (red) | ||
| 1 | 15A | 12 V socket (rear center console) |
| 2 | 15A | 12 V socket (front center console) |
| 3 | 15A | 12 V socket (luggage compartment) |
| 4 | 15A | Cigarette lighter/socket |
| 5 | 5A | Acoustic park assist |
| 6 | 5A | Telephone |
| 7 | - | Not used |
| 8 | - | Not used |
| 9 | 5A | Electromechanical parking brake |
| 10 | 5A | Lane Change Assistance control module |
| 11 | 5A | Rear seat heating |
| 12 | 5A | Airbag system |
