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Audi A4 2021 Fuse Box

Audi A4 2021 Fuse Box Info

 

Passenger compartment fuse box location:

The fuse box 1 is located on the left front side of the cockpit. 

The fuse box 2 is located in the driver's footwell (left-hand drive vehicle).

The fuse box 2 is located in the front passenger's footwell (right-hand drive vehicle).

 

Luggage compartment fuse box location:

 

 

Fuse Box Diagram | Layout

 

Passenger compartment fuse box 1:

Fuse/Relay N° Functions
1 Convenience access and start authorization control module
2 Audi phone box, USB input
4 Head-up display
5 Audi music interface, USB input
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
14 Infotainment system
16 Steering column electronics, Steering wheel heating

 

Passenger compartment fuse box 2:

Fuse/Relay N° Functions
  Fuse panel A (brown)
1 Catalytic converter heating
2 Engine components
3 Exhaust doors, fuel injectors, radiator inlet, crankcase housing heater
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 sensor, mass airflow sensor, water pump
8 Water pump, high pressure pump, high pressure regulator valve, temperature valve, engine mount
9 Hot water pump, motor relay, 48V drivetrain generator, 48V water pump
10 Oil pressure sensor, oil temperature sensor
11 Clutch position sensor, 48V drivetrain generator, water pump, 12V drivetrain generator
12 Engine valves, engine mount
13 Engine cooling
14 Fuel injectors, engine control module
15 Ignition coils, heated oxygen sensors
16 Fuel pump
  Fuse panel B (red)
1 Anti-theft alarm system
2 Engine control module
3 Left front seat electronics, lumbar support, massaging seat
4 Automatic transmission selector lever
5 Horn
6 Parking brake
7 Diagnostic interface
8 Roof electronics control module
9 Emergency call system
10 Airbag control module
11 Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS)
12 Diagnostic connector, light/rain sensor
13 Climate control system
14 Right front door control module
15 Climate control system compressor
16 Brake system pressure reservoir
  Fuse panel C (black)
1 Front seat heating
2 Windshield wipers
3 Left headlight electronics
4 Panorama glass roof / sliding/tilting sunroof
5 Left front door control module
6 Sockets
7 Right rear door control module, right rear power window
8 All wheel drive control module
9 Right headlight electronics
10 Windshield washer system/headlight washer system control module
11 Left rear door control module, left rear power window
12 Parking heater
  Fuse panel D (black)
1 Front seat electronics, 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 input
8 Garage door opener
9 Audi adaptive cruise control, distance regulation
11 Front camera
12 Right headlight
13 Left headlight
14 Transmission fluid cooling
  Fuse 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

 

Luggage compartment fuse box:

Fuse/Relay N° Functions
  Fuse 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 control module
11 Luggage compartment lid lock, fuel filler door lock, convenience system control module
12 Luggage compartment lid
  Fuse panel B (red)
6 Electric compressor
  Fuse panel C (brown)
1 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
8 Auxilliary 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 control module
  Fuse 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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