Audi A7 and S7 4K8 (2021-2022) – fuse and relay box
Diagrams of fuse and relay boxes – Audi A7 and S7 4K8
Applies to vehicles manufactured in the years:
2021, 2022.
Passenger compartment
There are two fuse blocks in the cabin.
The first is on the left side of the cockpit.
The second is located in the driver’s footrest on left-hand drive vehicles or behind the cover in the front passenger footwell on right-hand drive vehicles.
Fuse panel in the cockpit
| Number | Description |
|---|---|
| Fuse panel A (black) | |
| A2 | Steering column adjustment |
| A3 | CD / DVD player |
| A4 | Steering column electronics |
| A5 | Light switch, switch panels |
| A6 | Volume control |
| A7 | Instrument cluster |
| A8 | Front MMI display |
| A9 | Steering wheel heating |
| Fuse panel B (brown) | |
| B2 | MMI Infotainment system control module |
| B3 | Audi music interface ;
USB connection. |
| B4 | Head-up display |
| B5 | Air conditioning system;
Fragrance system; Ionizer. |
| B9 | Steering column lock |
Foot fuse panel
* Assignment of fuses “C” and “D” is inverted for right-hand drive vehicles.
| Number | Description |
|---|---|
| Fuse panel A (black) | |
| A1 | 2021: Catalyst heating |
| A2 | Engine components |
| A3 | Engine components |
| A4 | Engine components |
| A5 | Brake light sensor |
| A6 | Engine components |
| A7 | Engine components |
| A8 | Engine components |
| A9 | Engine components;
48V water pump; 48V driveline generator. |
| A10 | Oil pressure sensor;
Oil temperature sensor. |
| A11 | Engine components;
48V water pump; 48V drive system generator; 12 V drive system generator. |
| A12 | Engine components |
| A13 | Radiator fan |
| A14 | Engine control module;
Fuel injectors. |
| A15 | Engine sensors;
Ignition coils; Oxygen sensors. |
| A16 | Fuel pump |
| Fuse panel B (red) | |
| B1 | Anti-theft alarm system |
| B2 | Engine control module |
| B3 | Front left lumbar support |
| B5 | Horn |
| B6 | Parking brake |
| B7 | Gate control module (diagnostics) |
| B8 | Roof electronics control module |
| B9 | Driver assistance systems control module |
| B10 | Airbag control module |
| B11 | Electronic Stability Control (ESC);
Anti-lock Braking System (ABS). |
| B12 | Diagnostic connector, light / rain sensor |
| B13 | Air conditioning system |
| B14 | Right front door control module |
| B15 | Air conditioning system, body electronics |
| B16 | Auxiliary battery control module;
Brake system pressure reservoir. |
| Fuse panel C (red) | |
| C1 | Engine ignition coils |
| C3 | 2021: High voltage heating, compressor |
| C5 | Engine mount |
| C6 | Automatic gearbox |
| C7 | Instrument panel |
| C8 | Air conditioning blower |
| C9 | Windshield wiper control module |
| C10 | Dynamic steering |
| C11 | Engine start |
| C12 | Automatic transmission fluid pump |
| Fuse panel D (black) | |
| D1 | Front seat heating |
| D2 | Wipers |
| D3 | Left headlight electronics |
| D4 | Panoramic glass sunroof |
| D5 | Left front door control module |
| D6 | Sockets |
| D7 | Right rear door control module |
| D8 | All-wheel drive control module (quattro) |
| D9 | Right headlight electronics |
| D10 | Windshield washer system / Headlight washer system |
| D11 | Left Rear Door Control Module |
| D12 | Auxiliary heating |
| Fuse panel E (brown) | |
| E1 | Seat ventilation;
Chair electronics; Rearview mirror; Air conditioning control panel at the rear; Diagnostic connector; Traffic Information (TMC) antenna. |
| E2 | Vehicle electrical system control module;
Gate control module. |
| E3 | Sound actuator / Exhaust sound tuning |
| E 4 | Gearbox heating valve |
| E5 | Starter |
| E7 | Active accelerator pedal |
| E8 | Night vision assistant |
| E9 | Adaptive cruise assistant |
| E11 | Intersection assistant, driver assistance systems;
Traffic jam pilot. |
| E12 | External sound generator |
| E15 | USB connection |
Fuse box in the trunk
The fuses are located under a cover on the boot floor.
| Number | Description |
|---|---|
| Fuse panel A (black) | |
| A1 | Heat management |
| A3 | Passenger’s rear seat belt pretensioner |
| A4 | Driver’s side rear seat belt pretensioner |
| A5 | Pneumatic suspension |
| A6 | Automatic gearbox |
| A7 | Rear sunroof;
Rear spoiler. |
| A8 | Rear seat heating |
| A9 | Central lock;
Left tail light. |
| A10 | Front left seat belt pretensioner |
| A11 | Central locking of the trunk lid;
Fuel filler door; Trunk lid. |
| A12 | Trunk lid |
| Fuse panel B (red) | |
| B1 | Suspension stabilization control module |
| B2 | Service switch |
| B4 | Electric drive train;
Power electronics. |
| B5 | Brake system;
Brake booster. |
| B6 | High-voltage battery coolant pump |
| B7 | Auxiliary air conditioning |
| B8 | Air conditioning system compressor |
| B9 | Auxiliary battery control module |
| B10 | High voltage battery |
| B11 | High voltage charger |
| B14 | Heat management;
Coolant pumps. |
| B15 | Temperature management control module |
| Fuse panel C (brown) | |
| C1 | Driver assistance systems control module |
| C2 | Phonebox Audi |
| C3 | 2021: Front seat electronics, right lumbar support;
2022: Right lumbar support. |
| C4 | Side help |
| C5 | 2021: Rear air conditioning system control panel;
Infotainment system control panel. |
| C6 | Tire pressure monitoring system |
| C7 | Emergency call system |
| C8 | – |
| C9 | Gear selector, automatic transmission |
| C10 | – |
| C11 | Vehicle Opening / Starting (NFC) |
| C12 | Garage door opener |
| C13 | Reversing camera, peripheral cameras |
| C14 | Convenient system control module;
Right rear light. |
| C16 | Right front seat belt pretensioner |
| Fuse panel D (black) | |
| D1-D16 | Not assigned |
| Fuse panel E (red) | |
| E2 | External antenna |
| E3 | Exhaust gas cleaning;
Sound actuator. |
| E 4 | Air conditioning system rear control panel |
| E5 | Right trailer hitch lamp |
| E7 | Towbar |
| E8 | Left trailer hitch lamp |
| E9 | 2021: Trailer hitch socket; 2022: Trailer hitch socket, high voltage battery. |
| E10 | All-wheel drive control module;
Sports differential. |
| E11 | Exhaust gas treatment |
| E12 | 2021: 48V driveline generator |
