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

19/01/2024
AUDI

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.

 

And the second is behind the lid in the left footwell.

 

Luggage Compartment

It is located on the left side of the trunk behind the side trim panel.

 
Fuse Box Diagrams

Cockpit fuse panel

 

Assignment of the fuses on the left side of the dashboard

No Description
A1 2018-2019: Climate control system;
2020-2021: Climate control system, interior air sensor
A2 2018-2020: Phone, roof antenna
2021: Audi phone box
A3 2018-2019: Climate control system, fragrance system, ionizer;
2020-2021: Climate control system, fragrance system, particulate matter sensor
A4 Head-up display
A5 2018-2019: Audi music interface;
2020-2021: Audi music interface, USB sockets
A6 2021: Instrument panel
A7 Steering column lock
A8 Front MMI display
A9 Instrument cluster
A10 Volume control
A11 Light switch, switch panels
A12 Steering column electronics
A14 MMI Infotainment system control module
A15 Steering column adjustment
A16 Steering wheel heating
 

 

Footwell fuse panel

 

Assignment of the fuses in the footwell

No Description
  Fuse panel A (brown)
A1 Engine ignition coils
A2 2018-2020: Engine start, Electric motor coupling
2021: Engine start, electric drive clutch
A3 Windshield wiper control module
A4 Left headlight electronics
A5 Climate control system blower
A6 Instrument panel
A7 Windshield wipers
A8 2021: High-voltage heating, compressor
A9 Panoramic glass roof
   
  Fuse panel B (black)
B1 Engine mount
B2 Left rear door control module
B3 Windshield washer system/headlight washer system
B4 Right headlight electronics
B5 Front seat heating
B6 Right rear door control module
B7 Sockets
B8 Left front door control module
B9 2018-2019: Not Used;
2020-2021: Parking heater
   
  Fuse panel C (red)
C1 Anti-theft alarm system
C2 Engine control module
C5 Horn
C6 Parking brake
C7 Gateway control module (diagnosis)
C8 2018-2020: Interior headliner lights
2021: Roof electronics control module
C9 Driver assist systems control module
C10 Airbag control module
C11 2018-2019: Electronic Stabilization Control (ESC);
2020: Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS)
C12 2018-2019: Diagnostic connector, light/rain sensor;
2020: Rear climate control unit, diagnostic connector, light/rain sensor
C13 Climate control system
C14 Right front door control module
C15 Climate control system, body electronics
C16 2018-2019: Not Used;
2020: Brake system
   
  Fuse panel D (black)
D1 2021: Engine components
D2 Engine components
D3 Engine components
D4 Engine components
D5 Brake light sensor
D6 Engine components
D7 Engine components
D8 Engine components
D9 Engine components
D10 Oil pressure sensor, oil temperature sensor
D11 2018-2020: Engine start
2021: Engine components
D12 Engine components
D13 Radiator fan
D14 2018-2020: Engine control module
2021: Engine control module, fuel injectors
D15 Engine sensors
D16 Fuel pump
 

Luggage Compartment Fuse Box

Assignment of the fuses in the trunk

No Description
  Fuse panel A (black)
A1 2018-2019: Not Used;
2020-2021: Thermal management
A5 Air suspension
A6 Automatic transmission
A7 Right rear seat adjustment
A8 Rear seat heating
A9 2018-2020: Central locking, tail lights
2021: Left tail light
A10 Front belt tensioner on driver's side
A11 2018-2019: 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
A12 Luggage compartment lid
   
  Fuse panel B (red)
B1 Rear climate control system blower
B2 2021: Exterior antenna
B3 2018-2019: Not Used;
2020-2021: Exhaust treatment, sound actuator
B4 Rear climate control system control panel
B5 Right trailer hitch light
B6 Trailer hitch positioning motor
B7 Trailer hitch
B8 Left trailer hitch light
B9 Trailer hitch socket
B10 Sport differential
B11 2018-2019: Not Used;
2020-2021: Exhaust treatment
B12 2021: 48 V drivetrain generator
   
  Fuse panel C (brown)
C1 Driver assist systems control module
C2 Rear Audi phone box
C3 Rear seat adjustment
C4 Side assist
C5 Rear Seat Entertainment (Audi tablet)
C6 Tire pressure monitoring system
C7 Emergency call system
C8 2018-2019: Fuel tank monitoring;
2020-2021: Parking heater radio receiver, fuel tank monitoring
C9 Automatic transmission selector lever
C10 2018-2019: TV tuner;
2020-2021: TV tuner, data exchange control module
C11 2018-2020: Vehicle opening/start (NFC)
2021: Convenience access and start authorization control module
C12 Garage door opener
C13 Rearview camera, peripheral cameras
C14 2018-2020: Central locking, tail lights
2021: Convenience system control module, right tail light
C15 Left rear seat adjustment
C16 Front belt tensioner on front passenger's side
   
  Fuse panel D (black)
D1 2018-2019: 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
D2 Gateway control module (communication)
D3 Sound actuator
D4 Transmission heating valve
D5 2018-2019: Engine start;
2020-2021: Engine start, electric motor
D7 2018-2019: Not Used;
2020-2021: Active accelerator pedal
D8 2018-2019: Night vision assist;
2020-2021: Night vision assist, active suspension
D9 Adaptive cruise assist
D11 2018-2020: Intersection assistant, driver assist systems
2021: Intersection assistant, driver assist systems, radar systems, camera systems
D12 2018-2019: Not Used;
2020-2021: Exterior sound
D13 2021: USB input
D14 Right headlight
D15 Left headlight
   
  Fuse panel E (red)
E1 2018-2019: Not Used;
2020-2021: Active suspension
E2 2018-2019: Not Used;
2020-2021: Service disconnect switch
E3 Refrigerator
E4 2018-2019: Not Used;
2020-2021: Electric motor
E5 Brake system
E6 2018-2019: Not Used;
2020-2021: High-voltage battery water pump
E7 2018-2019: Not Used;
2020: Interior climate control
2021: Auxiliary climate control
E8 2018-2019: Not Used;
2020: A/C compressor
2021: Climate control system compressor
E9 Auxiliary battery control module
E10 2018-2019: Not Used;
2020-2021: High-voltage battery
E11 2018-2019: Not Used;
2020-2021: High-voltage battery
E14 2018-2019: Not Used;
2020-2021: Thermal management
E15 2018-2019: Not Used;
2020-2021: Thermal management
   
  Fuse panel F (white)
F1 Rear center armrest heating
F2 Rear sliding sunroof
F3 CD/DVD player
F5 AC socket
F6 Passenger’s side rear safety belt tensioner
F7 Front center armrest heating
F8 Rear footrest heating
F11 Rear Seat Remote
F12 Driver’s side rear safety belt tensioner

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