Audi A3 (8P) – Fuse and Relay

Audi A3 of the second series 2G (designation 8P) were produced in 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 and 2013. Sports versions were marked as S3. In our article you will find all the information about fuses and relays for the Audi A3 8P car with box diagrams and their locations. Highlight the cigarette lighter fuse.

audi a3 8pThere are 4 main fuse boxes in this model:

  1. Relay box under the hood Audi a3 8p;
  2. Central fuse box under the hood;
  3. Fuse box in the passenger compartment of the Audi A3;
  4. Battery fuse box.

Engine compartment

Relay box

This element is typical for the Audi A3 with diesel engines and is located in the plenum box.

relay box under the hood a3

Appointment

  1. Spare;
  2. Glow plug control relay;
  3. Spare;
  4. Spare;
  5. Air outlet relay;
  6. Coolant pump relay.

Fuse box

real photo of a3 8p fuse box
real photo of a3 8p fuse box

Type 1

fuse box diagram
diagram of the fuse box

The decoding of fuse and relay boxes does not coincide with all audi a3 and depends on the year of manufacture and your equipment. Check the current description by referring to the diagrams on the stickers on the back of the cover.

Protected components

Option 1

1Relay for main ignition circuits
2Coolant pump relay (AXX / B HZ / BMJ / B PY / B UB / BWA)
3
4Fuel pump relay (BMJ / BUB)
F1(30A) Anti-lock braking system (ABS)
F2(30A) Anti-lock braking system (ABS)
F3(20A) ^ 2007: Multifunction control module 2
F4(5A) Multifunction control module 1
F5(15A) Horn
F6(15A) Engine management
F7
F8
F9(10A) Engine management
F10(10A) Engine management
F11(10A) Engine management
F12(10A) Engine management
F13(15A) Transmission control system (automatic transmission) (manual transmission (DSG)
F14
F15(10A) Coolant pump motor
F16(5A) Steering column control module
F17(5A) Instrument panel
F18(30A) Audio system
F19(15D / 25A) Audio system, navigation system
F20(5A) Navigation system, telephone
F21
F22
F23(5A / 10A) Engine management
F24(5A) Diagnostic unit
F25
F26
F27(5A) Exhaust control valve (BHZ)
F28(25A) Engine management
F29(5A) Coolant pump relay, exhaust air pump relay
F30(20A) Auxiliary heater
F31(30A) Windshield wiper
F32
F33
F34
F35
F36
F37
F38(10A) Cooling fan motor control module, engine management system
F39(5A) Brake light switch (brake pedal position sensor), clutch pedal position sensor
F40(20A) Engine management
F41
F42(5A) Engine management
F43(30A) Engine management
F44
F45
F46
F47(30A / 40A) Multifunction control module 1
F48(30A / 40A) Multifunction control module 1
F49(40A) ^ 2007: Instrument panel fuse / relay box, multifunction control unit relay 2
F50
F51(40A) Engine management
F52(40A50A) ^ 2007: Instrument panel fuse / relay box, auxiliary circuit relay, multifunction control unit 1.
F53(50A) ^ 2007: Power seats, instrument panel fuse / relay box
F54

Option 2

1Relay 2 main ignition circuits
2Starter relay
3Fuel pump relay-1.6 (BGU) / 3.2 (BDB)
4Relay 1 of the main ignition circuits
F1(30A) Anti-lock braking system (ABS)
F2(30A) Anti-lock braking system (ABS)
F3(20A) Multifunction control module2
F4(5A) Multifunction control module 1- except 3.2 (BDB)
F5(20A) Horn
F6(5A / 20A / 30A) Engine management system – petrol
F7(5A) Brake light switch (brake pedal position sensor)
F8(10A) Cooling fan motor control module, engine management system
F9(10A) Engine management
F10(10A) Engine management
F11(25A) Engine management system – petrol
F12(15A) Engine management
F13(20A) Automatic transmission
F14
F15(40A) Starter
F16(15A) Steering column control module
F17(10A) Instrument panel
F18(30A) Audio system
F19(15A) Audio system, navigation system
F20(5A) Telephone
F21(10A) Navigation system
F22
F23
F24(10A) Diagnostic module, ignition switch
F25
F26(5A) Engine management system – Diesel
F27(10A) Crankcase ventilation heater
F28(20A) Automatic transmission
F29(10A / 20A) Engine management
F30(20A) Auxiliary heater
F31(25A) Windshield wiper
F32(10A) Engine management
F33(15A) Fuel booster pump
F34
F35
F36
F37
F38(10A) Headlight range control
F39(5A) Engine oil temperature sensor, instrument cluster
F40(30A) Instrument panel fuse / relay box 1
F41
F42(5A) Engine management system – petrol
F43(20A) Brake servo vacuum pump
F44Engine management system – Diesel
F45(10A / 15A) Engine management
F46(10A) Engine management
F47(40A) Multifunction control module 1
F48(40A) Multifunction control module 1
F49(30A) Multifunction control module relay 2
F50
F51(40A) Engine management system – petrol
F52(50A) Multifunction control module 1
F53(50A) Instrument panel fuse / relay box 1 (F32-F37) – except 3.2 (BDB)
F54(50A) Cooling fan motor control module

Option 3

1Relay 2 main ignition circuits
2Starter relay
3Fuel pump relay (BDB / BGU / BMJ)
4Relay 1 of the main ignition circuits
F1(30A) Anti-lock braking system (ABS)
F2(30A) Anti-lock braking system (ABS)
F3(20A) Multifunction control module 2
F4(5A) Multifunction control module 1 (except BDB / BMJ)
F5(20A) Horn
F6(15A / 20A / 30A) Engine management
F7(5A) Brake light switch (brake pedal position sensor), clutch pedal position sensor
F8(10A) Cooling fan motor control module, engine management system
F9(10A) Coolant pump motor (if equipped), engine management system
F10(10A) Engine management
F11(25A) Engine management system petrol)
F12(15A) Engine management
F13(20A) Transmission control system (automatic transmission) (manual transmission (DSG)
F14
F15(40A) Starter
F16(15A) Steering column control module
F17(10A) Instrument panel
F18(30A) Audio system
F19(15A) Audio system, navigation system
F20(5A) Telephone
F21(10A) Navigation system
F22
F23
F24(10A) Diagnostic unit
F25
F26(5A / 10A) Engine management
F27(5A / 10A) Crankcase ventilation heater
F28(20A) Automatic transmission
F29(10A20A) Engine management
F30(20A) Auxiliary heater
F31(30A) Windshield wiper
F32(10A) Engine management
F33(15A) Engine management
F34
F35
F36
F37
F38(10A) Headlight range control
F39(5A) Engine oil condition sensor
F40(20 / 30A) Dashboard fuse / relay box 1 (F1-F11 / F29-F31) (except BDB / BMJ)
F41(10A) Engine management
F42(5AL0A) Engine management
F43(20A) Brake servo vacuum pump (if equipped)
F44(10A) Engine management
F45(10A / 15A) Engine management
F46(10A) Engine management
F47(40A) Multifunction control module 1
F48(40A) Multifunction control module 1
F49(30A) Dashboard fuse / relay box 1 (F1-F11 / F29-F31) – (BDB / BMJ), multifunction control unit relay 2
F50
F51(40A) Engine management
F52(50A) Instrument panel fuse / relay box, auxiliary circuit relay, multifunction control module 1.
F53(50A) Dashboard fuse / relay box 1 (F32-F37) – (BDB / BMJ)
F54(50A) Cooling fan motor control module

Type 2

fuse box diagram

Assignment

1Relay for main ignition circuits
2BSE pump relay
F1(20A) ^ 2007: Multifunctional control unit2
F2(5A) Steering column control module
F3(5A) Multifunction control module 1
F4(30A) Anti-lock braking system (ABS)
F5(15A) Transmission control system (automatic transmission) (manual transmission (DSG)
F6(5A) Instrument cluster control module
F7
F8(15D / 25A) Audio system, navigation system
F9(5A) Navigation system, telephone
F10(5A / 10A) Engine management
F11(20A) Additional heater
F12(5A) Diagnostic unit
F13(25A / 30A) Engine management
F14(20A) Engine management
F15(5A / 10A / 15A) Engine management
F16(30A) Anti-lock braking system (ABS)
F17(15A) Horn
F18(30A) Audio system
F19(30A) Windshield wiper
F20(20А) Fuel pressure regulator control valve (BPT / BPU / BYT)
F21(10A / 15A) Engine management
F22(5A) Brake light switch (brake pedal position sensor), clutch pedal position sensor
F23(5A / 10A / 15A) Coolant pump relay, engine management system
F24(10A) Cooling fan motor control module (some models), engine management system
F25(30A / 40A) Multifunction control unit 1
F26(30A / 40A) Multifunction control unit 1
F27(40A) Exhaust air system (BSE) pump
F28(40A) ^ 2007: Instrument Panel Fuse / Relay Box, Relay 2, Multifunction Control Module
F29(50A) ^ 2007: Power seats, instrument panel fuse / relay box
F30(40A50A) ^ 2007: Instrument panel fuse / relay box 1, auxiliary circuit relay, multifunction control unit 1.

Passenger compartment fuse box

Located on the left side of the dashboard, behind a protective cover.

removing the cover

diagram of this box with fuses

fuse box diagram in the passenger compartment

Designation

F1(10A) Diagnostic connector, engine management system, headlight range control, light switch, trailer control module
F2(10A) Automatic transmission control system, manual transmission (DSG), ABS system, brake light switch (brake pedal position sensor), diagnostic unit, engine management system, 4WD electronic control unit, power steering
F3(5A) Airbag
F4(5A) Engine oil condition sensor, garage door remote control system, interior rearview mirror, navigation system, seat heaters, heating / air conditioning system, parking system control unit / control, reversing lights (with manual transmission), TCS / ESP master switch , control unit for seat occupancy detection, tire pressure monitoring system, windshield washer nozzle heaters
F5(5A) Xenon headlamp control module (left)
F6(5A) Xenon headlamp control module (right)
F7
F8
F9
F10
F11
F12(10A) Door control module (driver), door control module (passenger)
F13(10A) Door control module (rear left), door control module (rear right), multifunction control module 2
F14(10A) Automatic transmission control system, manual transmission (DSG), ABS system (some models), parking control module
F15(10A) Interior lamps
F16(10A) Rain / sunlight sensor, auxiliary heater remote control receiver, Heating / air conditioning diagnostic socket
F17(5A) Anti-theft system
F18
F19
F20
F21
F22(40) Heater / air conditioner
F23(30A) Driver’s door window lifter motor
F24(20A) Cigarette lighter
F25(30A) Heated rear window
F26(20A) Charging connector
F27(15A) Fuel pump control module (if equipped), fuel pump relay (if equipped), start relay (fuel system) (if equipped)
F28(30A) Power window motor (rear left), power window motor (rear right)
F29
F30(20A) Automatic transmission
F31(20A) Brake servo vacuum pump (if equipped)
F32(30A) Headlamp washers
F33(20A) Luke
F34(20A) Heated seats
F35
F36(10A) Power seats
F37(20A) Air conditioning, seat heaters
F38(30A) Passenger door power window motor
F39
F40(40) Heater / air conditioner
F41(15A) Rear window washer
F42(15A) Windscreen / rear window washer pump
F43(20A) Multifunction control module 2
F44(20A) Trailer control module
F45(15A / 20A) Trailer control module
F46(10A) Trailer socket
F47(5A) Telephone connector
F48(10A) Training vehicle
F49(5A) Service vehicles, training vehicle

The fuse number 24 at 20A is responsible for the cigarette lighter.

Battery fuses

There are also 2 variants of execution.

Type 1

F1(150A / 200A) Generator
F2(80A) Power steering
F3(80A) Cooling fan motor
F4(80A) Dashboard fuse / relay box 1, dashboard fuse / relay box 2 ^ 2) – BDB
F5(100A) Additional heater
F6(50A) Dashboard fuse / relay box 1 (F12-F17 / F44-F45) -3.2 (BDB)
F7

Type 2

F1(150A / 200A) Generator
F2(80A) Power steering
F3(50A) Cooling fan motor control module
F4(80A) ^ 10/05 Dashboard fuse / relay box
F5(80A) 11 / 05-07: Dashboard fuse / relay box
F6
F7(50A / 80A) Service vehicles

Additional Information

Video example of fuse locations on the Audi A3 8p.

 

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