Audi S4 (2008) – fuse box diagram
Year of production: 2008
Instrument panel (driver’s side)
Fuse carrier (black)
| Number | Electric equipment | Ampere rattings [A] |
| 1 | Dynamic steering | 5 |
| 2 | Clutch sensor | 5 |
| 3 | Garage door opener | 5 |
| 4 | Audi lane assist | 10 |
| 5 | Air conditioner | 5 |
| 6 | Headlight range control (right) | 5 |
| 7 | Headlight range control (left) | 5 |
| 8 | Control unit 1 for vehicle’s electrical system | 5 |
| 9 | Interior mirrors | 5 |
| 10 | Selector gate | 5 |
| 11 | Heated washer jets | 5 |
| 12 | Air conditioner | 5 |
Fuse carrier (brown)
| Number | Electric equipment | Ampere rattings [A] |
| 1 | — | — |
| 2 | Clutch sensor | 5 |
| 3 | Fuel pump (diesel/petrol) | 20 |
| 25 |
| 4 | Auxiliary water pump (3.2 FSI) | 5 |
| 5 | Seat heating (left-side) with/without seat ventilation | 30 |
| 6 | Electronic stabilisation program | 10 |
| 7 | Horn | 25 |
| 8 | Electric window motor (left door) | 30 |
| 9 | Wiper motor | 30 |
| 10 | Electronic stabilisation program | 25 |
| 11 | Door control unit (driver’s side) | 15 |
| 12 | Rain and light sensor | 5 |
Fuse carrier (red)
| Number | Electric equipment | Ampere rattings [A] |
| 1 | — | — |
| 2 | — | — |
| 3 | Lumbar support | 10 |
| 4 | Dynamic steering | 35 |
| 5 | Interior light | 5 |
| 6 | Control unit 1 for vehicle’s electrical system | 35 |
| 7 | Control unit 1 for vehicle’s electrical system | 30 |
| 8 | Control unit 1 for vehicle’s electrical system | 30 |
| 9 | Tilting panorama roof/sun roof | 20 |
| 10 | Control unit 1 for vehicle’s electrical system | 30 |
| 11 | — | — |
| 12 | Convenience electronics | 5 |
Instrument panel (passenger’s side)
Fuse carrier (black)
| Number | Electric equipment | Ampere rattings [A] |
| 1 | — | — |
| 2 | — | — |
| 3 | — | — |
| 4 | — | — |
| 5 | Steering column switch module | 5 |
| 6 | Electronic Stabilisation Program | 5 |
| 7 | Diagnostic connector | 5 |
| 8 | Gateway (diagnostic interface for data bus) | 5 |
| 9 | — | — |
| 10 | — | — |
| 11 | — | — |
| 12 | — | — |
Fuse carrier (brown)
| Number | Electric equipment | Ampere rattings [A] |
| 1 | CD drive | 5 |
| 2 | Switch module for Audi drive select | 5 |
| 3 | MMI/Radio | 10 |
| 20 |
| 4 | Light switch | 5 |
| 5 | Control unit for instrument cluster | 5 |
| 6 | Ignition lock | 5 |
| 7 | — | — |
| 8 | Air conditioner blower | 40 |
| 9 | Steering column lock | 5 |
| 10 | Air conditioner | 10 |
| 11 | Diagnostic connector | 10 |
| 12 | Steering column switch module | 5 |
Luggage compartment
Fuse carrier (black)
| Number | Electric equipment | Ampere rattings [A] |
| 1 | — | — |
| 2 | Control unit for trailer | 15 |
| 3 | Control unit for trailer | 20 |
| 4 | Control unit for trailer | 20 |
| 5 | Electronic parking brake | 5 |
| 6 | Electronic suspension control | 15 |
| 7 | Electro-mechanical parking brake | 30 |
| 8 | Control unit 2 for vehicle’s electrical system | 30 |
| 9 | — | — |
| 10 | Control unit 2 for vehicle’s electrical system | 30 |
| 11 | Control unit 2 for vehicle’s electrical system | 20 |
| 12 | — | — |
Fuse carrier (brown)
| Number | Electric equipment | Ampere rattings [A] |
| 1 | Electrical socket | 15 |
| 2 | — | — |
| 3 | Radio/navigation | 7,5 |
| 4 | Control unit for digital sound system | 30 |
| 5 | MMI | 5 |
| 6 | Door control unit (driver’s side) | 30 |
| 7 | Electro-mechanical parking brake | 30 |
| 8 | Seat heating, rear | 30 |
| 9 | Door control unit (passenger side) | 30 |
| 10 | Remote control receiver for auxiliary heating | 5 |
| 11 | Door control unit (passenger side) | 15 |
| 12 | Control unit for reversing camera | 5 |
Fuse carrier (red)
| Number | Electric equipment | Ampere rattings [A] |
| 1 | Socket, centre console, rear | 15 |
| 2 | Socket, centre console, front | 15 |
| 3 | Socket, luggage compartment | 15 |
| 4 | Cigarette lighter | 15 |
| 5 | Parking aid | 5 |
| 6 | Phone pre-installation without handsfree system (VDA interface) | 5 |
| 7 | Control unit for adaptive cruise control | 15 |
| 8 | — | — |
| 9 | EPB switch (electro-mechanical parking brake) | 5 |
| 10 | Lane change assist feature | 5 |
| 11 | Seat heating, rear | 5 |
| 12 | Airbag | 5 |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.