Audi A4 and S4 B9/8W – fuse box diagram
Year of manufacture: 2022.
Lighter fuse / electrical outlet on Audi A4 and S4 Is fuse #6 (black fuse panel C) in the fuse box in the driver / passenger leg room.
| 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 |
Fuse box location
Driver’s legroom (right side steering wheel)
Front passenger’s legroom (right-hand drive)
Fuse assignment in passenger compartment
| Number | Description |
|---|---|
| Brown panel A | |
| 1 | Catalytic converter heating |
| 2 | Engine components |
| 3 | Exhaust ports;
Fuel injectors; Air intake; Engine heating. |
| 4 | Vacuum pump;
Hot water pump; NOx sensor; Particulate matter sensor; Biodiesel sensor; Exhaust port. |
| 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; Motor mount. |
| 9 | Hot water pump;
Motorized relay. 48 V traction 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 | Motor control module |
| 3 | Lumbar support;
Front left seat electronics; Seat massage. |
| 4 | Automatic transmission selection mechanism |
| 5 | Horn |
| 6 | Electromechanical parking brake |
| 7 | CAN port control module |
| 8 | Electronic Air 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 | Control unit for the right front door |
| 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 roof / sloping roof |
| 5 | Front left door control module |
| 6 | 12V power socket |
| 7 | Right rear door control module;
Right rear window actuator. |
| 8 | AWD control module |
| 9 | Right Headlight Electronics |
| 10 | Windshield washers;
Headlight washers. |
| 11 | Left rear door and window control module |
| 12 | Parking Lot Heater |
| Black panel D | |
| 1 | Front seat electronics;
Seat ventilation; Rearview mirror; Rear air conditioning, heating and ventilation control system; Windshield misting; CAN diagnostics. |
| 2 | CAN port;
Air conditioning, heating and ventilation control system. |
| 3 | Sound generator |
| 4 | Clutch pedal position sensor |
| 5 | Starting the engine;
Emergency shutdown. |
| 6 | CAN port;
Traffic jam information system (TMC). |
| 7 | USB charging port |
| 8 | Homelink (garage door opener) |
| 9 | Adaptive cruise control;
Remote control. |
| 10 | – |
| 11 | Video Camera |
| 12 | Matrix LED Headlight and LED Headlight Right |
| 13 | Matrix LED headlight and LED headlight left |
| 14 | Transmission fluid cooling valve |
| 15 | Warning;
Hands-free kit. |
| Red panel E. | |
| 1 | Ignition coils |
| 2 | A/C Compressor |
| 3 | – |
| 4 | – |
| 5 | Left Headlight |
| 6 | Automatic transmission |
| 7 | Dashboard |
| 8 | Air conditioning system (fresh air blower) |
| 9 | Headlight right |
| 10 | Dynamic control |
| 11 | Starting the engine |
Driver’s side cockpit
Fuse assignment in the driver’s side cockpit
| Number | Description |
|---|---|
| 1 | Opening and starting the vehicle (NFC) |
| 2 | Audi Phonebox;
Mobile Device Charger. |
| 3 | – |
| 4 | Main Screen |
| 5 | Audi music interface;
USB charging port. |
| 6 | Front air conditioning controls |
| 7 | Steering column lock |
| 8 | Infotainment system display |
| 9 | Instrument cluster |
| 10 | Information and Entertainment Unit |
| 11 | Light Switch |
| 12 | Steering column electronics |
| 13 | Particle sensor for air conditioning system |
| 14 | Infotainment system |
| 15 | – |
| 16 | Steering wheel heating;
Steering column electronics. |
Left boot side
Boot fuse assignment
| 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 | Left side rear lights |
| 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;
Right side front seat electronics; Seat massage. |
| 4 | Audi Lateral Assistance |
| 5 | – |
| 6 | Tire pressure monitor |
| 7 | Opening and starting the vehicle (NFC) |
| 8 | Parking lot heater radio receiver;
Intelligent module (fuel tank). |
| 9 | – |
| 10 | TV Tuner;
CAN Port. |
| 11 | Auxiliary Battery Module |
| 12 | Homelink (garage door opener) |
| 13 | Reverse Reversing Camera;
Peripheral cameras. |
| 14 | Right rear light |
| 15 | – |
| 16 | Airbag system;
Passenger seat belt pretensioner. |
| Red panel E. | |
| 1 | – |
| 2 | – |
| 3 | AdBlue |
| 4 | – |
| 5 | Trailer hitch (right light) |
| 6 | – |
| 7 | Towing hook |
| 8 | Trailer hitch (left light) |
| 9 | Towing hitch (socket) |
| 10 | Sports differential;
4-wheel drive. |
| 11 | Exhaust gas treatment, AdBlue |
