Audi A4 / S4 (B9/8W; 2017-2019…) fuses

 

In this article, we consider the fifth-generation Audi A4 / S4 (B9/8W), produced from 2017 to the present. Here you will find fuse box diagrams of Audi A4 and S4 2017 and 2018, 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 2017-2019…


Cigar lighter / power outlet fuse in the Audi A4/S4 is the fuse №6 (Black fuse panel C) in the Driver’s/front passenger’s footwell fuse box.


Fuse Box Location

Driver’s/front passenger’s footwell

Left-hand drive vehicles: It is located under the footrest.
Right-hand drive vehicles: Behind the cover under the glove box.The location of the fuses in the passenger compartment: Audi A4/S4 (B9/8W; 2017-2019...)

Driver’s side cockpit

The location of the fuses in the passenger compartment: Audi A4/S4 (B9/8W; 2017-2019...)

Luggage compartment

It is located in the left side of the trunk behind the trim panel.The location of the fuses in the trunk: Audi A4/S4 (B9/8W; 2017-2019...)

Fuse box diagrams

2017

Driver’s/front passenger’s footwell (LHD)

Fuse box diagram (Driver’s/front passenger’s footwell): Audi A4/S4 (B9/8W; 2017)

Front passenger‘s footwell (RHD)

Fuse box diagram (Front passenger‘s footwell (RHD)): Audi A4/S4 (B9/8W; 2017)

Assignment of the fuses in the Passenger compartment (footwell) (2017)

Number Electric equipment
Brown panel A
1
2 Mass airflow sensor, camshaft adjustment
3 Exhaust doors, fuel injectors, radiator inlet
4 Vacuum pump, hot water pump, particulate sensor, biodiesel sensor
5 Brake light sensor
6 Engine valves
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
Red panel B
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
Black panel C
1 Front seat heating
2 Windshield wipers
3 Left head light electronics
4 Panorama glass roof/ sliding/tilting sunroof
5 Left front door control module
6 Sockets
7 Right rear door control module
8
9 Right headlight electronics
10 Windshield washer system/headlight washer system
11 Left rear door control module
Black panel D
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
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
Red panel E
1 Ignition coils
2 Natural gas tank valves
3
4
5 Engine mount
6 Automat ic transmission
7 Instrument panel
8 Climate control system (blower)
9
10 Dynamic steering
11 Engine start


Driver’s side cockpit

Fuse box diagram (Driver’s side cockpit): Audi A4/S4 (B9/8W; 2017)

Assignment of the fuses in the Driver’s side cockpit (2017)

Number Electric equipment
1
2 Telephone
3
4 Head-up display
5 Audi music interface
6 Front climate control system controls
7 Steering column lock
8 Infotainment syst em 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 box diagram (Left luggage compartment): Audi A4/S4 (B9/8W; 2017)

Assignment of the fuses in the Left luggage compartment (2017)

Number Electric equipment
Black panel A
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
12 Electric luggage compartment lid
Red panel B
Not assigned
Brown panel C
1
2 Telephone
3 Lumbar support
4 Audi side assist
5
6
7
8
9
10
11
12 Homelink
13 Rearview camera, peripheral cameras
14 Right tail lights
15
16 Right safety belt tensioner
Red panel E
1
2 Sound-amplifier
3 AdBlue
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

2018

Driver’s/front passenger’s footwell (LHD)

Fuse box diagram (Driver’s/front passenger’s footwell): Audi A4/S4 (B9/8W; 2018)

Front passenger‘s footwell (RHD)

Fuse box diagram (Front passenger‘s footwell (RHD)): Audi A4/S4 (B9/8W; 2018)

Assignment of the fuses in the Passenger compartment (footwell) (2018)

Number Electric equipment
Brown panel A
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
Red panel B
1 Anti-theft alarm system
2 Engine control module
3 Lumbar support
4 Automatic transmission selector mechanism
5 Horn
6 Electromechanical 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
Black panel C
1 Front seat heating
2 Windshield wipers
3 Left head light electronics
4 Panorama glass roof/ sliding/tilting 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
Black panel D
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
Red panel E
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 box diagram (Driver’s side cockpit): Audi A4/S4 (B9/8W; 2018)

 

Assignment of the fuses in the Driver’s side cockpit (2018)

Number Electric equipment
1
2 Telephone
3
4 Head-up display
5 Audi music 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 box diagram (Left luggage compartment): Audi A4/S4 (B9/8W; 2018)

Assignment of the fuses in the Left luggage compartment (2018)

Number Electric equipment
Black panel A
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
Red panel B
Not assigned
Brown panel C
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
Red panel E
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


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