Audi A4 and S4 B9/8W – fuse box diagram
Year of manufacture: 2022.
Cigarette lighter / electrical socket fuse in Audi A4 and S4. is fuse #6 (black fuse panel C) in the fuse box in the driver’s / passenger’s legroom.
| Color | Amps [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 fuse box
Driver’s legroom (right side steering wheel)
Front passenger legroom (steering wheel on right side)
Assignment of fuses in the passenger compartment
| Number | Description |
|---|---|
| Brown panel A | |
| 1 | Catalyst heating |
| 2 | Engine components |
| 3 | Exhaust doors;
Fuel injectors; Air intake; Engine heating. |
| 4 | Vacuum pump;
Hot water pump; NOx sensor; Particulate sensor; Biodiesel sensor; Exhaust door. |
| 5 | Brake light sensor |
| 6 | Engine Valves;
Camshaft adjustment |
| 7 | Heated oxygen sensor;
Mass airflow sensor; Water pump. |
| 8 | Water pump;
High pressure pump; High pressure control valve; Temperature valve; Engine mount. |
| 9 | Hot water pump;
Motor relay. 48 volt drive train generator; 48V water pump. |
| 10 | Oil pressure sensor;
Oil temperature sensor. |
| 11 | Clutch pedal position sensor;
Engine start; Water pump; 48 volt drive train generator; 12 volt drive train generator. |
| 12 | Engine Valves;
Engine assembly. |
| 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;
Left front seat electronics; Seat massage. |
| 4 | Automatic transmission selection mechanism |
| 5 | Horn |
| 6 | Electromechanical parking brake |
| 7 | CAN gate control module |
| 8 | Overhead electronic control module |
| 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 | A/C compressor |
| 16 | Brake system pressure reservoir |
| Black panel C | |
| 1 | Front seat heating |
| 2 | Windshield wipers |
| 3 | Left headlight electronics |
| 4 | Panoramic glass roof/sliding/tilting roof |
| 5 | Left front door control module |
| 6 | 12V power socket |
| 7 | Right rear door control module;
Right rear window actuator. |
| 8 | AWD (4-wheel drive) control module |
| 9 | Right headlight electronics |
| 10 | Windshield washers;
Headlight washers. |
| 11 | Left rear door and window control module |
| 12 | Parking heater |
| Black panel D | |
| 1 | Front seat electronics;
Seat ventilation; Rear view 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 jam information system (TMC). |
| 7 | USB charging port |
| 8 | Homelink (garage door opener) |
| 9 | Adaptive Cruise Control;
Distance control. |
| 10 | – |
| 11 | Video camera |
| 12 | Matrix LED headlight and right LED headlight |
| 13 | Matrix LED headlight and left LED headlight |
| 14 | Transmission fluid cooling valve |
| 15 | Alert;
Hands-free kit. |
| E red panel. | |
| 1 | Ignition coils |
| 2 | A/C compressor |
| 3 | – |
| 4 | – |
| 5 | Left headlight |
| 6 | Automatic transmission |
| 7 | Instrument panel |
| 8 | Air conditioning system (fresh air blower) |
| 9 | Right headlight |
| 10 | Dynamic control |
| 11 | Engine start |
Driver side cockpit
Driver-side cockpit fuse assignment
| Number | Description |
|---|---|
| 1 | Vehicle opening and starting (NFC). |
| 2 | Audi Phonebox;
Mobile device charger. |
| 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 matter sensor for air conditioning system |
| 14 | Infotainment system |
| 15 | – |
| 16 | Steering wheel heating;
Steering column electronics. |
Left side of the trunk
Trunk fuse allocation
| 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 side |
| 10 | Airbag module |
| 11 | Electric trunk lid;
Fuel filler flap; Comfort access system module. |
| 12 | Electric trunk lid; |
| Panel red B. | |
| 6 | Electric compressor;
Battery power cutoff. |
| Brown panel C | |
| 1 | External antenna |
| 2 | Audi Phonebox |
| 3 | Lumbar support;
Right front seat electronics; Seat massage. |
| 4 | Audi Side Assist |
| 5 | – |
| 6 | Tire pressure monitor |
| 7 | Opening and starting the vehicle (NFC) |
| 8 | Parking heater radio receiver;
Smart module (fuel tank). |
| 9 | – |
| 10 | TV Tuner;
CAN gateway. |
| 11 | Auxiliary battery module |
| 12 | Homelink (garage door opener) |
| 13 | Reversing camera;
Peripheral cameras. |
| 14 | Right taillights |
| 15 | – |
| 16 | Airbag system;
Passenger seat belt pretensioner. |
| E red panel. | |
| 1 | – |
| 2 | – |
| 3 | AdBlue |
| 4 | – |
| 5 | Trailer hitch (right light) |
| 6 | – |
| 7 | Towing hook |
| 8 | Trailer hitch (left light) |
| 9 | Trailer hitch (socket) |
| 10 | Sport differential;
4-wheel drive. |
| 11 | Exhaust gas treatment, AdBlue |
The article Audi A4 and S4 B9/8W (2022) – fuse box comes from the site Fuseów schematics.