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

Audi A7 and S7 4K8 (2021-2022) - fuse and relay box

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;


B9 Steering column lock

Foot fuse panel

* Assignment of fuses “C” and “D” is inverted for right-hand drive vehicles.Audi A7 and S7 4K8 (2021-2022) - fuse and relay box

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.

Audi A7 and S7 4K8 (2021-2022) - fuse and relay box

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
C9 Gear selector, automatic transmission
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
READ:  Audi Q8 (2019-2020) - fuse box

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