Audi A8 2021 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.
Luggage compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box 1:
| Fuse/Relay N° | Functions |
| Fuse panel 1 (black) | |
| 1 | Climate control system, air quality sensor |
| 2 | Audi phone box, exterior antenna |
| 3 | Climate control system, fragrance system, particulate matter sensor |
| 4 | Head-up display |
| 5 | Audi music interface, USB connection |
| 6 | Instrument panel |
| 7 | Steering column lock |
| 8 | Upper/lower display |
| 9 | Instrument cluster |
| 10 | Volume control |
| 11 | Light switch, switch panels |
| 12 | Steering column electronics |
| 14 | MMI Infotainment system control module |
| 15 | Steering column adjustment |
| 16 | Steering wheel heating |
Passenger compartment fuse box 2:
| Fuse/Relay N° | Functions |
| Fuse panel 1 (brown) | |
| 1 | Ignition coils |
| 2 | Engine start, electric drive clutch |
| 3 | Windshield wiper control module |
| 4 | Left headlight electronics |
| 5 | Climate control system blower |
| 6 | Instrument panel |
| 7 | Windshield wipers |
| 9 | Panoramic glass roof |
| Fuse panel 2 (black) | |
| 1 | Engine mount |
| 2 | Left rear door control module |
| 3 | Windshield washer system/headlight washer system |
| 4 | Right headlight electronics |
| 5 | Front seat heating |
| 6 | Right rear door control module |
| 7 | Sockets |
| 8 | Left front door control module |
| 9 | Parking heater |
| Fuse panel 3 (red) | |
| 1 | Anti-theft alarm system |
| 2 | Drive system control module |
| 5 | Horn |
| 6 | Parking brake |
| 7 | Diagnostic interface |
| 8 | Roof electronics control module |
| 9 | Driver assistance systems control module |
| 10 | Airbag control module |
| 11 | Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS) |
| 12 | Climate control system rear control panel, diagnostic connector, light/rain sensor |
| 13 | Climate control system, vehicle electrical system control module |
| 14 | Right front door control module |
| 15 | Climate control system compressor, vehicle electrical system control module |
| 16 | Brake system pressure reservoir |
| Fuse panel 4 (black) | |
| 2 | Engine components, coolant pump, oxygen sensors |
| 3 | Exhaust doors, fuel injectors, air intake, motor heating |
| 4 | NOX sensor, particulate sensor, biodisel sensor, exhaust doors |
| 5 | Brake light sensor |
| 6 | Engine valves, camshaft adjustment |
| 7 | Heated oxygen sensor, mass airflow sensor |
| 8 | Coolant pump, high pressure pump, mass airflow sensor, fuel pressure regulation |
| 9 | 48 volt starter generator, 48 volt coolant pump, motor components |
| 10 | Oil pressure sensor, oil temperature sensor |
| 11 | 48 volt starter generator, 48 volt coolant pump, 12 volt starter generator |
| 12 | Engine valves, engine mount |
| 13 | Engine cooling |
| 14 | Engine control module, fuel injectors |
| 15 | Heated oxygen sensors, charge air cooling, ignition coils |
| 16 | Fuel pump |
Luggage compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuse panel 1 (black) | |
| 1 | Thermal management |
| 5 | Air suspension/suspension control |
| 6 | Automatic transmission control module |
| 7 | Right rear seat adjustment |
| 8 | Rear seat heating |
| 9 | Convenience system control module, left tail lights |
| 10 | Front belt tensioner on driver's side |
| 11 | Luggage compartment lid central locking, fuel filler door, convenience system control module, sunshade |
| 12 | Luggage compartment lid control module |
| Fuse panel 2 (red) | |
| 1 | Rear climate control system blower |
| 2 | Exterior antenna |
| 3 | Exhaust treatment, sound actuator |
| 4 | Rear climate control system control panel |
| 5 | Right trailer hitch light |
| 6 | Trailer hitch positioning motor |
| 7 | Trailer hitch release |
| 8 | Left trailer hitch light |
| 9 | Trailer hitch socket, high-voltage battery |
| 10 | Allroad sport differential |
| 11 | Exhaust treatment |
| Fuse panel 3 (brown) | |
| 1 | Driver assist systems control module |
| 2 | Rear Audi phone box |
| 3 | Rear seat adjustment |
| 4 | Side assist |
| 5 | Screens in the rear, Rear Seat Remote |
| 6 | Tire pressure monitoring system |
| 7 | Emergency call and communication control module |
| 8 | Auxiliary heating radio receiver, tank module |
| 9 | Automatic transmission selector lever |
| 10 | TV tuner, data exchange and telematics control module |
| 11 | Convenience access and start authorization control module |
| 12 | Garage door opener |
| 13 | Rearview camera, peripheral cameras |
| 14 | Convenience system control module, right tail light |
| 15 | Left rear seat adjustment |
| 16 | Front belt tensioner on front passenger's side |
| Fuse panel 4 (black) | |
| 1 | Seat ventilation, rear seat heating, rearview mirror, refrigerator, diagnostic connector |
| 2 | Diagnostic interface |
| 3 | Sound actuator |
| 4 | Transmission heating valve |
| 5 | Engine start, electric drive |
| 7 | Active accelerator pedal |
| 8 | Night vision assist, active roll stabilization |
| 9 | Adaptive cruise assist |
| 11 | Intersection assistant, driver assist systems, radar systems, camera systems |
| 12 | Exterior sound generator |
| 13 | USB connection |
| 14 | Right headlight |
| 15 | Left headlight |
| Fuse panel 5 (red) | |
| 1 | Active suspension |
| 2 | Service disconnect switch |
| 3 | Refrigerator |
| 4 | Electric drive system, power electronics |
| 5 | Brake system |
| 6 | High-voltage battery water pump |
| 7 | Auxiliary climate control |
| 8 | Climate control system compressor |
| 9 | Auxiliary battery control module |
| 10 | High-voltage battery |
| 11 | High-voltage charger |
| 14 | Thermal management |
| 15 | Thermomanagement control module |
| Fuse panel 6 (white) | |
| 1 | Rear center armrest heating |
| 2 | Rear panoramic glass roof |
| 3 | DVD drive |
| 5 | AC socket |
| 6 | Passenger’s side rear safety belt tensioner |
| 7 | Front center armrest heating |
| 8 | Rear footrest heating |
| 11 | Rear Seat Remote |
| 12 | Driver’s side rear safety belt tensioner |
