Audi A8-S8 (D5-4N) | 2017-2024 | Fuse Box Diagrams and Locations

The fourth-generation Audi A8 and S8 (chassis codes D5/4N), representing Audi’s flagship luxury sedan and its high-performance variant, has been available from 2017 to the present. Known for its cutting-edge technology, unparalleled comfort, and refined performance, the A8 and S8 set a benchmark in the executive sedan market.

In this article, you will find detailed fuse box diagrams for Audi A8 and S8 models produced in 2017, 2018, 2019, 2020, 2021, 2022, 2023 and 2024. These diagrams provide critical insights into the vehicle’s electrical systems, helping owners and technicians understand the assignment of each fuse (fuse layout). This information is essential for diagnosing electrical issues, performing maintenance, or addressing necessary repairs.

This guide serves as an invaluable resource for understanding the electrical system of the fourth-generation Audi A8 and S8, ensuring that owners have the knowledge required to maintain the functionality, reliability, and performance of these exceptional luxury sedans.

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...)

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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
A12017-2019: Climate control system;
from 2020: Climate control system, interior air sensor
A22017-2020: Phone, roof antenna
from 2021: Audi phone box
A32017-2019: Climate control system, fragrance system, ionizer;
from 2020: Climate control system, fragrance system, particulate matter sensor
A4Head-up display
A52017-2019: Audi music interface;
from 2020: Audi music interface, USB sockets
A6from 2021: 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

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Footwell fuse panel

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

Assignment of the fuses in the footwell

№Description
Fuse panel A (brown)
A1Engine ignition coils
A22017-2020: Engine start, Electric motor coupling
from 2021: Engine start, electric drive clutch
A3Windshield wiper control module
A4Left headlight electronics
A5Climate control system blower
A6Instrument panel
A7Windshield wipers
A8from 2021: 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
B92017-2019: Not Used;
from 2020: Parking heater
Fuse panel C (red)
C1Anti-theft alarm system
C2Engine control module
C5Horn
C6Parking brake
C7Gateway control module (diagnosis)
C82017-2020: Interior headliner lights
from 2021: Roof electronics control module
C9Driver assist systems control module
C10Airbag control module
C112017-2019: Electronic Stabilization Control (ESC);
from 2020: Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS)
C122017-2019: Diagnostic connector, light/rain sensor;
from 2021: Rear climate control unit, diagnostic connector, light/rain sensor
C13Climate control system
C14Right front door control module
C15Climate control system, body electronics
C162017-2019: Not Used;
from 2020: Brake system
Fuse panel D (black)
D1from 2021: 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
D112017-2020: Engine start
from 2021: Engine components
D12Engine components
D13Radiator fan
D142017-2020: Engine control module
from 2021: Engine control module, fuel injectors
D15Engine sensors
D16Fuel pump

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Luggage Compartment Fuse Box

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

Assignment of the fuses in the trunk

№Description
Fuse panel A (black)
A12017-2019: Not Used;
from 2020: Thermal management
A5Air suspension
A6Automatic transmission
A7Right rear seat adjustment
A8Rear seat heating
A92017-2020: Central locking, tail lights
from 2021: Left tail light
A10Front belt tensioner on driver’s side
A112017-2019: Central locking, rear blind;
2020: Central locking, rear blind, fuel filler door
from 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
B2from 2021: Exterior antenna
B32017-2019: Not Used;
from 2020: 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
B112017-2019: Not Used;
from 2020: Exhaust treatment
B12from 2021: 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
C82017-2019: Fuel tank monitoring;
from 2020: Parking heater radio receiver, fuel tank monitoring
C9Automatic transmission selector lever
C102017-2019: TV tuner;
from 2020: TV tuner, data exchange control module
C112017-2020: Vehicle opening/start (NFC)
from 2021: Convenience access and start authorization control module
C12Garage door opener
C13Rearview camera, peripheral cameras
C142017-2020: Central locking, tail lights
from 2021: Convenience system control module, right tail light
C15Left rear seat adjustment
C16Front belt tensioner on front passenger’s side
Fuse panel D (black)
D12017-2019: Seat ventilation, seat heating, rearview mirror, climate control system, rear climate control system controls;
from 2020: Seat ventilation, rear seat heating, rear-view mirror, refrigerator, diagnostic connector
D2Gateway control module (communication)
D3Sound actuator
D4Transmission heating valve
D52017-2019: Engine start;
from 2020: Engine start, electric motor
D72017-2019: Not Used;
from 2020: Active accelerator pedal
D82017-2019: Night vision assist;
from 2020: Night vision assist, active suspension
D9Adaptive cruise assist
D112017-2020: Intersection assistant, driver assist systems
from 2021: Intersection assistant, driver assist systems, radar systems, camera systems
D122017-2019: Not Used;
from 2020: Exterior sound
D13from 2021: USB input
D14Right headlight
D15Left headlight
Fuse panel E (red)
E12017-2019: Not Used;
from 2020: Active suspension
E22017-2019: Not Used;
from 2020: Service disconnect switch
E3Refrigerator
E42017-2019: Not Used;
from 2020: Electric motor
E5Brake system
E62017-2019: Not Used;
from 2020: High-voltage battery water pump
E72017-2019: Not Used;
2020: Interior climate control
from 2021: Auxiliary climate control
E82017-2019: Not Used;
2020: A/C compressor
from 2021: Climate control system compressor
E9Auxiliary battery control module
E102017-2019: Not Used;
from 2020: High-voltage battery
E112017-2019: Not Used;
from 2020: High-voltage battery
E142017-2019: Not Used;
from 2020: Thermal management
E152017-2019: Not Used;
from 2020: 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

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