Audi A8 / S8 (D5/4N; 2018-2021) fuses

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In this article, we consider the fourth-generation Audi A8 / S8 (D5/4N), available from 2017 to the present. Here you will find fuse box diagrams of Audi A8 and S8 2018, 2019, 2020, 2021, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout).

Fuse Layout Audi A8 2018-2021


Fuse Box Location

Passenger Compartment

In the cabin, there are two fuse blocks:

The first is on the left front side of the cockpit.The location of the fuses in the passenger compartment: Audi A8 / S8 (2018-2020...)

And the second is behind the lid in the left footwell.The location of the fuses in the passenger compartment: Audi A8 / S8 (2018-2020...)

Luggage Compartment

It is located on the left side of the trunk behind the side trim panel.The location of the fuses in the trunk: Audi A8 / S8 (2018-2020...)

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Fuse Box Diagrams

Cockpit fuse panel

Cockpit fuse panel diagram: Audi A8 / S8 (2018, 2019, 2020...)

Assignment of the fuses on the left side of the dashboard
Description
A12018-2019: Climate control system;
2020-2021: Climate control system, interior air sensor
A22018-2020: Phone, roof antenna
2021: Audi phone box
A32018-2019: Climate control system, fragrance system, ionizer;
2020-2021: Climate control system, fragrance system, particulate matter sensor
A4Head-up display
A52018-2019: Audi music interface;
2020-2021: Audi music interface, USB sockets
A62021: Instrument panel
A7Steering column lock
A8Front MMI display
A9Instrument cluster
A10Volume control
A11Light switch, switch panels
A12Steering column electronics
A14MMI Infotainment system control module
A15Steering column adjustment
A16Steering wheel heating

Footwell fuse panel

Footwell fuse panel diagram: Audi A8 / S8 (2018, 2019, 2020...)

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Assignment of the fuses in the footwell
Description
Fuse panel A (brown)
A1Engine ignition coils
A22018-2020: Engine start, Electric motor coupling
2021: Engine start, electric drive clutch
A3Windshield wiper control module
A4Left headlight electronics
A5Climate control system blower
A6Instrument panel
A7Windshield wipers
A82021: High-voltage heating, compressor
A9Panoramic glass roof
Fuse panel B (black)
B1Engine mount
B2Left rear door control module
B3Windshield washer system/headlight washer system
B4Right headlight electronics
B5Front seat heating
B6Right rear door control module
B7Sockets
B8Left front door control module
B92018-2019: Not Used;
2020-2021: Parking heater
Fuse panel C (red)
C1Anti-theft alarm system
C2Engine control module
C5Horn
C6Parking brake
C7Gateway control module (diagnosis)
C82018-2020: Interior headliner lights
2021: Roof electronics control module
C9Driver assist systems control module
C10Airbag control module
C112018-2019: Electronic Stabilization Control (ESC);
2020: Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS)
C122018-2019: Diagnostic connector, light/rain sensor;
2020: Rear climate control unit, diagnostic connector, light/rain sensor
C13Climate control system
C14Right front door control module
C15Climate control system, body electronics
C162018-2019: Not Used;
2020: Brake system
Fuse panel D (black)
D12021: Engine components
D2Engine components
D3Engine components
D4Engine components
D5Brake light sensor
D6Engine components
D7Engine components
D8Engine components
D9Engine components
D10Oil pressure sensor, oil temperature sensor
D112018-2020: Engine start
2021: Engine components
D12Engine components
D13Radiator fan
D142018-2020: Engine control module
2021: Engine control module, fuel injectors
D15Engine sensors
D16Fuel pump

Luggage Compartment Fuse Box

Trunk fuse box diagram: Audi A8 / S8 (2018, 2019, 2020...)

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Assignment of the fuses in the trunk
Description
Fuse panel A (black)
A12018-2019: Not Used;
2020-2021: Thermal management
A5Air suspension
A6Automatic transmission
A7Right rear seat adjustment
A8Rear seat heating
A92018-2020: Central locking, tail lights
2021: Left tail light
A10Front belt tensioner on driver's side
A112018-2019: Central locking, rear blind;
2020: Central locking, rear blind, fuel filler door
2021: Luggage compartment lid central locking, fuel filler door, sunshade, luggage compartment cover
A12Luggage compartment lid
Fuse panel B (red)
B1Rear climate control system blower
B22021: Exterior antenna
B32018-2019: Not Used;
2020-2021: Exhaust treatment, sound actuator
B4Rear climate control system control panel
B5Right trailer hitch light
B6Trailer hitch positioning motor
B7Trailer hitch
B8Left trailer hitch light
B9Trailer hitch socket
B10Sport differential
B112018-2019: Not Used;
2020-2021: Exhaust treatment
B122021: 48 V drivetrain generator
Fuse panel C (brown)
C1Driver assist systems control module
C2Rear Audi phone box
C3Rear seat adjustment
C4Side assist
C5Rear Seat Entertainment (Audi tablet)
C6Tire pressure monitoring system
C7Emergency call system
C82018-2019: Fuel tank monitoring;
2020-2021: Parking heater radio receiver, fuel tank monitoring
C9Automatic transmission selector lever
C102018-2019: TV tuner;
2020-2021: TV tuner, data exchange control module
C112018-2020: Vehicle opening/start (NFC)
2021: Convenience access and start authorization control module
C12Garage door opener
C13Rearview camera, peripheral cameras
C142018-2020: Central locking, tail lights
2021: Convenience system control module, right tail light
C15Left rear seat adjustment
C16Front belt tensioner on front passenger's side
Fuse panel D (black)
D12018-2019: Seat ventilation, seat heating, rearview mirror, climate control system, rear climate control system controls;
2020-2021: Seat ventilation, rear seat heating, rear-view mirror, refrigerator, diagnostic connector
D2Gateway control module (communication)
D3Sound actuator
D4Transmission heating valve
D52018-2019: Engine start;
2020-2021: Engine start, electric motor
D72018-2019: Not Used;
2020-2021: Active accelerator pedal
D82018-2019: Night vision assist;
2020-2021: Night vision assist, active suspension
D9Adaptive cruise assist
D112018-2020: Intersection assistant, driver assist systems
2021: Intersection assistant, driver assist systems, radar systems, camera systems
D122018-2019: Not Used;
2020-2021: Exterior sound
D132021: USB input
D14Right headlight
D15Left headlight
Fuse panel E (red)
E12018-2019: Not Used;
2020-2021: Active suspension
E22018-2019: Not Used;
2020-2021: Service disconnect switch
E3Refrigerator
E42018-2019: Not Used;
2020-2021: Electric motor
E5Brake system
E62018-2019: Not Used;
2020-2021: High-voltage battery water pump
E72018-2019: Not Used;
2020: Interior climate control
2021: Auxiliary climate control
E82018-2019: Not Used;
2020: A/C compressor
2021: Climate control system compressor
E9Auxiliary battery control module
E102018-2019: Not Used;
2020-2021: High-voltage battery
E112018-2019: Not Used;
2020-2021: High-voltage battery
E142018-2019: Not Used;
2020-2021: Thermal management
E152018-2019: Not Used;
2020-2021: Thermal management
Fuse panel F (white)
F1Rear center armrest heating
F2Rear sliding sunroof
F3CD/DVD player
F5AC socket
F6Passenger’s side rear safety belt tensioner
F7Front center armrest heating
F8Rear footrest heating
F11Rear Seat Remote
F12Driver’s side rear safety belt tensioner