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Audi A4 (2018) - fuse box diagram

avatar Jonathan Yarden Jan 31, 2021 · 5 min. read

In this article you will find a description of fuses and relays Audi, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.

Year of production: 2018

Fuse assignment – driver’s/front passenger’s footwell

Audi A4 - fuse box diagram - driver's front passenger's footwell

Front passenger ‘s footwell (right -hand drive vehicle)

Audi A4 - fuse box diagram - driver's front passenger's footwell (right hand drive vehicle)

Fuse panel A (brown)

Number Electric equipment
1 —
2 Mass airflow sensor, camshaft adjustment, charge air cooler pump
3 Exhaust doors, fuel injectors, radiator inlet
4 Vacuum pump, hot water pump, particulate sensor, biodiesel sensor
5 Brake light sensor
6 Engine valves, camshaft adjustment
7 Heated oxygen sensor, mass airflow sensor
8 Water pump, high pressure pump, high pressure regulator valve
9 Hot water pump
10 Oil pressure sensor, oil temperature sensor
11 Clutch pedal position sensor
12 Engine valves
13 Radiator fan
14 Fuel injectors
15 Ignition coils
16 Fuel pump

 

Fuse panel B (red)

Number Electric equipment
1 Anti-theft alarm system
2 Engine control module
3 Lumbar support
4 Automatic transmission selector mechanism
5 Horn
6 Electromechan ical park ing brake
7 Gateway control module
8 Interior headl iner lights
9 —
10 Airbag control module
11 Electronic Stabilization Control (ESC)
12 Diagnostic connector, light/rain sensor
13 Climate control system
14 Right front door control module
15 A/C compressor

Fuse panel C (black)

Number Electric equipment
1 Front seat heating
2 Windshield wipers
3 Left head light electronics
4 Panorama glass roof/ sliding/t ilting sunroof
5 Left front door control module
6 Sockets
7 Right rear door control module
8 All wheel drive
9 Right headlight electronics
10 Windshield washer system/headlight washer system
11 Left rear door control module

Fuse panel D (black)

Number Electric equipment
1 Seat ventilation, rearv iew mirror, rear climate control system controls
2 Gateway, climate control system
3 Sound actuator/exhaust sound tuning
4 Clutch pedal position sensor
5 Engine start
6 —
7 Rear USB charg ing port
8 Homelink
9 Adaptive cruise control
10 —
11 Video camera
12 Matrix LED headlight/right LED headlight
13 Matrix LED headlight/left LED headlight
14 Rear window wiper

Fuse panel E (red)

Number Electric equipment
1 Ignition coils
2 Natural gas tank valves
3 —
4 —
5 Engine mount
6 Automatic transmission
7 Instrument panel
8 Climate control system (blower)
9 —
10 Dynamic steering
11 Engine start

Driver’s side cockpit fuse assignment

Audi A4 - fuse box diagram - driver's side cocpit

Number Electric equipment
1 —
2 Telephone
3 —
4 Head-up display
5 Audi mus ic interface, USB charging port
6 Front climate control system controls
7 Steering column lock
8 Infotainment system display
9 Instrument cluster
10 Infotainment unit
11 Light switch
12 Steering column electronics
13 —
14 Infotainment system
15 —
16 Steering wheel heating

Left luggage compartment fuse assignment

Audi A4 - fuse box diagram - luggage compartment

Fuse panel A (black)

Number Electric equipment
1 —
2 Windshield defroster
3 Windshield defroster
4 —
5 Suspension control
6 Automatic transmission
7 Rear window defogger
8 Rear seat heating
9 Tail lights
10 Left safety belt tensioner
11 Central locking system
12 Electric luggage compartment lid

 

Fuse panel B (red)

Number Electric equipment
Not assigned

 

Fuse panel C (brown)

Number Electric equipment
1 —
2 Telephone
3 Lumbar support
4 Audi side assist
5 —
6 —
7 —
8 Smart module (tank)
9 —
10 —
11 12 Volt battery
12 Homelink
13 Rearview camera, peripheral cameras
14 Right tail lights
15 —
16 Right safety belt tensioner

 

Fuse panel E (red)

Number Electric equipment
1 —
2 Sound-amplifier
3 AdBlue heating
4 —
5 Trailer hitch (right light)
6 —
7 Trailer hitch
8 Trailer hitch (left light)
9 Trailer hitch (socket)
10 Sport differential
11 Ad Blue

 

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

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