Audi A4 and S4 B9 / 8W (2022) – fuse box
Audi A4 and S4 B9 / 8W – fuse box diagram
Year of production: 2022.
The fuse for the cigarette lighter / power socket on the Audi A4 and S4 is fuse number 6 (black fuse panel C) in the fuse box in the driver / passenger footwell.
| Color | Amperes [A] |
|---|---|
| Black | 1 |
| Purple | 3 |
| Light brown | 5 |
| Brown | 7.5 |
| Red | 10 |
| Blue | 15 |
| Yellow | 20 |
| White or transparent | 25 |
| Green | 30 |
| Orange | 40 |
Location of the fuse box
Driver’s footwell (right-hand steering wheel)
Front passenger footwell (right-hand drive)
Assignment of fuses in the passenger compartment
| Number | Description |
|---|---|
| Brown panel A | |
| 1 | Catalyst heating |
| 2 | Engine components |
| 3 | Exhaust doors;
Fuel injectors; An air inlet; Engine heating. |
| 4 | Vacuum pump;
Hot water pump; NOx sensor; Particulate sensor; Biodiesel sensor; Exhaust doors. |
| 5 | Brake light sensor |
| 6 | Engine valves;
Camshaft adjustment |
| 7 | Heated oxygen sensor;
Mass air flow sensor; Water pump. |
| 8 | The water pump;
High pressure pump; High pressure regulating valve; Temperature valve; Engine mount. |
| 9 | Hot water pump;
Engine relay. 48V drive system generator; 48V water pump. |
| 10 | Oil pressure sensor;
Oil temperature sensor. |
| 11 | Clutch pedal position sensor;
Engine start; The water pump; 48V drive system generator; 12 V drive system generator. |
| 12 | Engine valves;
Mounting the engine. |
| 13 | engine cooling |
| 14 | Fuel injectors;
Engine control module. |
| 15 | Ignition coils;
Heated oxygen sensor. |
| 16 | Fuel pump |
| Red panel B. | |
| 1 | Anti-theft alarm system |
| 2 | Engine control module |
| 3 | Lumbar support;
Front left seat electronics; Armchair massage. |
| 4 | Automatic transmission selection mechanism |
| 5 | Horn |
| 6 | Electromechanical parking brake |
| 7 | CAN gate control module |
| 8 | Electronic control module under the ceiling |
| 9 | Emergency call system;
Communication module. |
| 10 | Airbag control module |
| 11 | Electronic Stability Control (ESC);ABS. |
| 12 | Diagnostic connector;
Light and rain sensor. |
| 13 | Air conditioning, heating and ventilation control system |
| 14 | Right front door control module |
| 15 | Air conditioning compressor |
| 16 | Brake pressure reservoir |
| Black panel C. | |
| 1 | Front seat heating |
| 2 | Windshield wipers |
| 3 | Left headlight electronics |
| 4 | Panoramic glass sunroof / sliding / tilting sunroof |
| 5 | Left front door control module |
| 6 | 12V power socket |
| 7 | Right Rear Door Control Module;
Right rear window actuator. |
| 8 | AWD Control Module (4WD) |
| 9 | Right headlight electronics |
| 10 | Windscreen washers;
Headlight washers. |
| 11 | Left rear door and window control module |
| 12 | Auxiliary heating |
| Black panel D | |
| 1 | Front seat electronics;
Seat ventilation; Rearview mirror; Rear air conditioning, heating and ventilation control system; Windshield defogger; CAN diagnostics. |
| 2 | CAN gateway;
Air conditioning, heating and ventilation control system. |
| 3 | Sound generator |
| 4 | Clutch pedal position sensor |
| 5 | Engine start;
Emergency shutdown. |
| 6 | CAN gateway;
Traffic Information System (TMC). |
| 7 | USB charging port |
| 8 | Homelink (garage door opener) |
| 9 | Adaptive cruise control;
Distance adjustment. |
| 10 | – |
| 11 | Video camera |
| 12 | Matrix LED headlight and right-hand LED headlight |
| 13 | Matrix LED headlight and left LED headlight |
| 14 | Transmission fluid cooling valve |
| 15 | Alarm;
Loudspeeker sysetm. |
| Red panel E. | |
| 1 | Ignition coils |
| 2 | Air conditioning compressor |
| 3 | – |
| 4 | – |
| 5 | Left headlight |
| 6 | Automatic Transmission |
| 7 | Instrument panel |
| 8 | Air conditioning system (fresh air blower) |
| 9 | Right headlight |
| 10 | Dynamic steering |
| 11 | Engine start |
Driver’s side cockpit
Assignment of fuses in the cockpit on the driver’s side
| Number | Description |
|---|---|
| 1 | Opening and Starting the Vehicle (NFC) |
| 2 | Audi Phonebox;
Charger for mobile devices. |
| 3 | – |
| 4 | Head-up display |
| 5 | Audi music interface;
USB charging port. |
| 6 | Front air conditioning controls |
| 7 | Steering column lock |
| 8 | Infotainment system display |
| 9 | Instrument cluster |
| 10 | Infotainment unit |
| 11 | Light switch |
| 12 | Steering column electronics |
| 13 | Particulate sensor for the air conditioning system |
| 14 | Infotainment system |
| 15 | – |
| 16 | Steering wheel heating;
Steering column electronics. |
Left side of the trunk
Assignment of fuses in the trunk
| Number | Description |
|---|---|
| Black panel A | |
| 1 | – |
| 2 | Windshield defroster |
| 3 | Windshield defroster |
| 4 | – |
| 5 | Suspension control |
| 6 | Automatic Transmission |
| 7 | Rear window defogger |
| 8 | Rear seat heating |
| 9 | Rear lights on the left |
| 10 | Airbag module |
| 11 | Electric trunk lid;
Fuel filler flap; Comfort access system module. |
| 12 | Electric trunk lid |
| Red panel B. | |
| 6 | Electric compressor;
Battery power cut. |
| Brown panel C. | |
| 1 | External antenna |
| 2 | Audi Phonebox |
| 3 | Lumbar support;
Front right seat electronics; Armchair massage. |
| 4 | Audi side assistant |
| 5 | – |
| 6 | Tire pressure monitor |
| 7 | Opening and starting the vehicle (NFC) |
| 8 | Parking heater radio receiver;
Intelligent module (fuel tank). |
| 9 | – |
| 10 | TV tuner;
CAN gateway. |
| 11 | Additional battery module |
| 12 | Homelink (garage door opener) |
| 13 | Rear view camera;
Peripheral cameras. |
| 14 | Right rear lights |
| 15 | – |
| 16 | Airbag system;
Passenger belt pretensioner. |
| Red panel E. | |
| 1 | – |
| 2 | – |
| 3 | AdBlue |
| 4 | – |
| 5 | Trailer hitch (right light) |
| 6 | – |
| 7 | Towbar |
| 8 | Trailer hitch (left light) |
| 9 | Trailer hitch (socket) |
| 10 | Sports differential;
4-wheel drive. |
| 11 | Exhaust gas treatment, AdBlue |
