Audi A3 of the second series 2G (designation 8P) were produced in the years 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 and 2013. Sport 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 circuit diagrams and their locations. Highlight the cigarette lighter fuse.
There are 4 main fuse boxes in this model:
- Relay box under the hood Audi a3 8p;
- Central fuse box under the hood;
- Fuse box in the passenger compartment of the Audi A3;
- Battery fuse box.
Contents
Engine compartment
Relay box
This element is typical for the Audi A3 with diesel engines and is located in the plenum box.
Diagram
Appointment
- Spare;
- Glow plug control relay;
- Spare;
- Spare;
- Air outlet relay;
- Coolant pump relay.
Fuse box
Phot for example
Type 1
Diagram
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
| 1 | Relay for main ignition circuits |
| 2 | Coolant pump relay (AXX / B HZ / BMJ / B PY / B UB / BWA) |
| 3 | – |
| 4 | Fuel 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
| 1 | Relay 2 main ignition circuits |
| 2 | Starter relay |
| 3 | Fuel pump relay-1.6 (BGU) / 3.2 (BDB) |
| 4 | Relay 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 |
| F44 | Engine 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
| 1 | Relay 2 main ignition circuits |
| 2 | Starter relay |
| 3 | Fuel pump relay (BDB / BGU / BMJ) |
| 4 | Relay 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
Diagram
Assignment
| 1 | Relay for main ignition circuits |
| 2 | BSE 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.
Photo
Diagram
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
Check out our YouTube video for more on this topic. Don’t forget to subscribe!
Hi there
Very quickly, do you know where the Audi A3 1.9Tdi 3-door hatchback 8P1 reverse switch location can I see it by opening the hood or do I need to find it underneath.
I look forward to your response.
Kind regards
Tony
Hello there, just need a bit of help, my car cranks but does not start, checked fuel pump, works perfectly, replaced fuses but I don’t know where the fuel pump relay is situated on an Audi 2.0 8p fsi 2005. TIA