Audi A4 2023 Fuse Box Info
Passenger compartment fuse box location:
The fuse box 1 is located on the left front side of the cockpit.
The fuse box 2 is located in the driver's footwell (left-hand drive vehicle).
The fuse box 2 is located in the front passenger's footwell (right-hand drive vehicle).
Luggage compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box 1:
| Fuse/Relay N° | Functions |
| 1 | Convenience access and start authorization control module |
| 2 | Audi phone box, USB connection |
| 4 | Head-up display |
| 5 | USB ports with charging function |
| 6 | Front climate control system control panel |
| 7 | Steering column lock |
| 8 | Center display |
| 9 | Instrument cluster |
| 10 | Volume control |
| 11 | Light switch, switch module |
| 12 | Steering column electronics |
| 14 | Infotainment system |
| 16 | Steering column electronics, Steering wheel heating |
Passenger compartment fuse box 2:
| Fuse/Relay N° | Functions |
| Fuse panel A (brown) | |
| 1 | Catalytic converter heating |
| 2 | Engine components |
| 3 | Exhaust doors, fuel injectors, air intake, motor 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 airflow sensor, water pump |
| 8 | Water pump, high pressure pump, high pressure regulator valve, temperature valve, engine mount |
| 9 | Hot water pump, motor relay, 48V drivetrain generator, 48V water pump |
| 10 | Oil pressure sensor, oil temperature sensor |
| 11 | Clutch position sensor, 48V drivetrain generator, water pump, 12V drivetrain generator |
| 12 | Engine valves, engine mount |
| 13 | Engine cooling |
| 14 | Fuel injectors, drive system control module |
| 15 | Ignition coils, heated oxygen sensors |
| 16 | Fuel pump |
| Fuse panel B (red) | |
| 1 | Anti-theft alarm system |
| 2 | Drive system control module |
| 3 | Left front seat electronics, lumbar support, massaging seat |
| 4 | Automatic transmission selector lever |
| 5 | Horn |
| 6 | Parking brake, Electronic Toll Collection System (ETC) |
| 7 | Diagnostic interface |
| 8 | Roof electronics control module |
| 9 | Emergency call and communication control module |
| 10 | Airbag control module |
| 11 | Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS) |
| 12 | Diagnostic connection, Electronic Toll Collection System (ETC), Light/rain sensor |
| 13 | Climate control system |
| 14 | Right front door control module |
| 15 | Climate control system compressor |
| 16 | Brake system pressure reservoir |
| Fuse panel C (black) | |
| 1 | Front seat heating |
| 2 | Windshield wipers |
| 3 | Left headlight electronics |
| 4 | Panorama glass roof / sliding/tilting sunroof |
| 5 | Left front door control module |
| 6 | 12 volt socket |
| 7 | Right rear door control module, right rear power window |
| 8 | All wheel drive control module |
| 9 | Right headlight electronics |
| 10 | Windshield washer system/headlight washer system control module |
| 11 | Left rear door control module, left rear power window |
| 12 | Parking heater |
| Fuse panel D (black) | |
| 1 | Front seat electronics, seat ventilation, rearview mirror, rear climate control system control panel, windshield heating, diagnostic connection |
| 2 | Diagnostic interface, vehicle electrical system control module |
| 3 | Engine sound control module |
| 4 | Clutch position sensor |
| 5 | Engine start, emergency shut-off |
| 6 | Diagnostic connection |
| 7 | USB connection |
| 8 | Garage door opener |
| 9 | Audi adaptive cruise control, adaptive distance regulation |
| 11 | Front camera |
| 12 | Right headlight |
| 13 | Left headlight |
| 14 | Transmission fluid cooling |
| Fuse panel E (red) | |
| 1 | Ignition coils |
| 2 | Climate control system compressor |
| 5 | Left headlight |
| 6 | Automatic transmission |
| 7 | Instrument panel |
| 8 | Climate control system blower |
| 9 | Right headlight |
| 10 | Dynamic steering |
| 11 | Engine start |
Luggage compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuse panel A (black) | |
| 2 | Windshield defroster |
| 3 | Windshield defroster |
| 5 | Suspension control |
| 6 | Automatic transmission |
| 7 | Rear window defogger |
| 8 | Rear seat heating |
| 9 | Left tail lights |
| 10 | Airbag, driver's side safety belt tensioner control module |
| 11 | Luggage compartment lid lock, fuel filler door lock, convenience system control module |
| 12 | Luggage compartment lid |
| Fuse panel B (red) | |
| 6 | Electric compressor |
| Fuse panel C (brown) | |
| 1 | Exterior antenna |
| 2 | Audi phone box |
| 3 | Right front seat electronics, lumbar support, massaging seat |
| 4 | Side assist |
| 6 | Tire pressure monitoring system |
| 7 | Convenience access and start authorization control module |
| 8 | Tank module |
| 10 | TV tuner, data exchange and telematics control module |
| 11 | Auxiliary battery control module |
| 12 | Garage door opener |
| 13 | Rearview camera, peripheral cameras |
| 14 | Right tail lights |
| 16 | Airbag, front passenger's side safety belt tensioner control module |
| Fuse panel E (red) | |
| 3 | Exhaust treatment |
| 5 | Right trailer hitch light |
| 7 | Trailer hitch |
| 8 | Left trailer hitch light |
| 9 | Trailer hitch socket |
| 10 | All wheel drive control module, sport differential |
| 11 | Exhaust treatment |
