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Audi A4 Fuse Diagram (B9 / 8W; 2020-2022)

12/01/2024
Fuse Box

In this article, we consider the fifth-generation Audi A4 / S4 (B9/8W) (facelifted), produced from 2019 to the present. Here you will find fuse box diagrams of Audi A4 and S4 2020, 2021, 2022, 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 A4 / S4 2020-2022

 

 

 

Fuse Box Location

 

 

Driver’s/front passenger’s footwell

The fuses are located in the footwell under the foot rest (left-hand drive vehicle) or behind the cover (right-hand drive vehicle).

 

 

Instrument panel

Additional fuses are located on the front side of the cockpit (driver’s side).

Luggage Compartment

The fuses are located under the left cover in the luggage compartment.

 

 

Fuse Box Diagrams

 

 

Driver’s/front passenger’s footwell

LHD

 

RHD

 

Assignment of the fuses in the front passenger footwell

No Equipment
Panel A (brown)  
1 Catalytic converter heating
2 Engine components
3 Exhaust doors, fuel injectors, air intake, motor heating
4 Vacuum pump, hot water pump, NOx sensor, particulate sensor, biodiesel sensor, exhaust doors
5 Brake light sensor
6 Engine valves, camshaft adjustment
7 Heated oxygen sensors, mass airflow sensor, water pump
8 Water pump, high pressure pump, high pressure regulator valve, temperature valve, engine mount
9 2020: Hot water pump, engine relay
2021-2022: Hot water pump, motor relay, 48 V starter generator, 48 V water pump
10 Oil pressure sensor, oil temperature sensor
11 Clutch position sensor, 48 V starter generator, water pump, 12V starter generator
12 Engine valves, engine mount
13 Engine cooling
14 Fuel injectors, drive system control module
15 Ignition coils, heated oxygen sensors
16 Fuel pump
Panel B (red)  
1 Anti-theft alarm system
2 Drive system control module
3 Left front seat electronics, lumbar support, massaging seat
4 Automatic transmission selector lever
5 Horn
6 Parking brake
7 Diagnostic interface (Gateway control module)
8 Roof electronics control module
9 Emergency call and communication control module
10 Airbag control module
11 Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS)
12 Diagnostic connection, light/rain sensor
13 Climate control system
14 Right front door control module
15 Climate control system compressor
16 2021-2022: Brake system pressure reservoir
Panel C (black)  
1 Front seat heating
2 Windshield wipers
3 Left headlight electronics
4 Panoramic glass roof / sliding/tilting sunroof
5 Left front door control module
6 12 volt socket
7 Right rear door control module, right rear power window
8 All wheel drive (AWD) control module
9 Right headlight electronics
10 Windshield washer system/headlight washer system control module
n Left rear door control module, left rear power window
12 Parking heater
Panel D (black)  
1 Front seat electronic, seat ventilation, rearview mirror, rear climate control system control panel, windshield heating, diagnostic connection
2 Diagnostic interface, vehicle electrical system control module
3 Sound generator
4 Clutch position sensor
5 Engine start, emergency shut-off
6 Diagnostic connection, traffic information antenna (TMC)
7 USB connection
8 Garage door opener
9 Audi adaptive cruise control, adaptive distance regulation
11 Front camera
12 Right headlight
13 Left headlight
14 Transmission fluid cooling
15 2020: Alarm and hands-free calling system
Panel E (red)  
1 Ignition coils
2 Climate control system compressor
5 Left headlight
6 Automatic transmission
7 Instrument panel
8 Climate control system blower
9 Right headlight
10 Dynamic steering
11 Engine start

 

Instrument panel

 

Assignment of the fuses in the driver's side of the cockpit

No Equipment
1 Convenience access and start authorization control module (NFC)
2 Audi phone box, USB connection
4 Head-up display
5 Audi music interface, USB connection
6 Front climate control system control panel
7 Steering column lock
8 Center display
9 Instrument cluster
10 Volume control
11 Light switch, switch module
12 Steering column electronics
13 2020: Particulate matter sensor for climate control system
14 Infotainment system
16 2020: Steering wheel heating
2021-2022: Steering column electronics, steering wheel heating

 

 

Luggage Compartment

 

 

Assignment of the fuses in the trunk

No Equipment
Panel A (black)  
2 Windshield defroster
3 Windshield defroster
5 Suspension control
6 Automatic transmission
7 Rear window defogger
8 Rear seat heating
9 Left tail lights
10 Airbag, driver's side safety belt tensioner control module
11 Luggage compartment lid lock, fuel filler door lock, convenience system control module
12 Luggage compartment lid
Panel B (red)  
6 2020: Battery power interrupt
2021-2022: Electric compressor
Panel C (brown)  
1 2021-2022: Exterior antenna
2 Audi phone box
3 Right front seat electronics, lumbar support, massaging seat
4 Side assist
6 Tire pressure monitoring system
7 Convenience access and start authorization control module (NFC)
8 Auxiliary heating, tank module
10 TV tuner, data exchange and telematics control module
11 Auxiliary battery control module
12 Garage door opener
13 Rearview camera, peripheral cameras
14 Right tail lights
16 Airbag, front passenger's side safety belt tensioner control module
Panel E (red)  
3 Exhaust treatment
5 Right trailer hitch light
7 Trailer hitch
8 Left trailer hitch light
9 Trailer hitch socket
10 All wheel drive control module, sport differential
11 Exhaust treatment

 

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