Fuses and relays Audi A3 (8P), 2003 - 2013

The Audi A3 (8P) was introduced in 2003 at the Geneva Motor Show. Initially, the model was available only as a 3-door hatchback, in July 2004 a 5-door version (Sportback) appeared, and in 2008 - a convertible. Restyling took place in 2005, 2008 and 2010. In this material, we will analyze in detail the fuse diagrams of the Audi A3 2nd generation (8P): 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 with engines 1.2 TSI, 1.4 TFSI, 1.6 8V, 1.6 FSI 16V, 1.6 8V  E-Power, 1.6 TDI, 1.8 TFSI, 1.9 TDI 8V, 1.9 TDI 8V DPF, 2.0 FSI 16V, 2.0 TDI, 2.0 TDI 16V, 2.0 TFSI, 3.2 VR6, RS3(2.5 TFSI).

General view of the car
Here you will find the locations and photos of the mounting blocks. Separately, we note the fuses responsible for the cigarette lighter and fuel pump.

In the passenger compartment

Fuse box

Location of the fuse box in the passenger compartment
Located on the driver's side at the end of the dashboard behind a plastic cover.


Access example.


General view of the mounting block.

Diagram
No. Description A
F1 Diagnostic connector, engine management system, headlight range control, light switch, trailer electrical control unit 10
F2 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 10
F3 Safety bag 5
F4 Engine Oil Condition Sensor, Garage Door Remote Control System, Interior Rearview Mirror, Navigation System, Seat Heaters, Heating/Air Conditioning System, Parking Control Unit/Control, Reversing Lights (with Manual Transmission), TCS/ESP Master Switch, Control Unit seat occupant detection systems, tire pressure monitoring system, windshield washer jet heaters 5
F5 Xenon headlight control unit (left) 5
F6 Xenon headlight control unit (right) 5
F7 Empty
F8 Empty
F9 Empty
F10 Empty
F11 Empty
F12 Door electrical control unit (driver), Door electrical control unit (passenger) 10
F13 Door electric control unit (rear left), door electric control unit (rear right), multifunction control unit 2 10
F14 Automatic transmission control system, manual transmission (DSG), ABS system (some models), parking system control unit 10
F15 Interior lamps 10
F16 Rain/Sunshine Sensor, Auxiliary Heater Remote Control Receiver, H/A Diagnostic Connector 10
F17 Anti-theft system 5
F18 Empty
F19 Empty
F20 Empty
F21 Empty
F22 Heater / air conditioner 40
F23 Driver's door glass lift motor 30
F24 Audi A3 cigarette lighter fuse 20
F25 Rear window heater 30
F26 Charging connector 20
F27 Fuel pump control module (if equipped), fuel pump relay (if equipped), start relay (fuel system) (if equipped) 15
F28 Power window motor (rear left), power window motor (rear right) 30
F29 Empty
F30 Automatic transmission 20
F31 Brake booster vacuum pump (if equipped) 20
F32 Headlight washers 30
F33 Sunroof 20
F34 Seat heater 20
F35 Empty
F36 Power seats 10
F37 Air conditioning, seat heaters 20
F38 Passenger's Power Window Motor 30
F39 Empty
F40 Heater / air conditioner 40
F41 Rear window washer 15
F42 Windshield/rear window washer pump 15
F43 Multifunction control box 2 20
F44 Trailer control unit 20
F45 15/20
F46 Trailer electrical connector 10
F47 phone connector 5
F48 training vehicle 10
F49 Service vehicles, training vehicle 5

Additional relay blocks

Installed on the left side under the instrument panel.

Diagrams
No. Description
Relay box #1 (Type 1: 2007-2012).
1 Headlight washer pump relay
2 Coolant Heater Relay 1 (Diesel with Auxiliary Heater)
3 Coolant Heater Relay 2 (Diesel with Auxiliary Heater)
4 Starter relay
5a Fuel Pump Relay (Diesel)
5b Fuel pump relay (petrol engine, BSE/BSF)
F1 Empty
F2 Empty
F3 Power seats 30A
F4 Empty
Relay box #1 (Type 2: 2005-2006).
1 Headlight washer pump relay
2a ^07/05 - Start Relay (Fuel System) (Petrol, BSE/BSF/BMJ/BUB)
2b Fuel pump relay (petrol engine, BSE/BSF)
3 →07/05: Starter relay
4 08/05^ - Starter relay
5a 08/05^ - Start Relay (Fuel System) (Petrol, BSE/BSF/BMJ/BUB)
5b 08/05^ - Fuel Pump Relay (Petrol, BSE/BSF)
F1 Empty
F2 Empty
F3 Power seats 30A
F4 Empty
Relay box #1 (Type 3: 2002-2005).
1 Headlight washer pump relay
2a Empty
2b Fuel Pump Relay (AZV/BKC/BKD)
3a Empty
3b Empty
4 training vehicle
5 training vehicle
F1 Power windows, rear (5-door models) (30A)
F2 Power windows, front (30A)
Relay block #2
1 Relay 2 of the multifunction control unit
2 Seat heater relay
3 Empty
4 Relay 1 of the multifunction control unit
5 Rear defroster relay
6 Horn relay
7 Windshield/rear window washer pump relay 2
8 Windshield/rear window washer pump relay 1
9 Ignition Auxiliary Relay

In the engine compartment

Location of the fuse box in the engine compartment of the car
Located on the left side of the engine compartment, next to the battery.

Fuse box


Access example.


The main underhood block. There are four types of schema variations  

Assigment of fuses in the engine compartment
Execution #1
 
Type #1
No. Purpose A
F1 Anti-Lock Braking System (ABS) 30
F2 30
F3 ^2007: Multifunction control unit 2 20
F4 Multifunction control box 1 5
F5 Sound signal 15
F6 Engine management 15
F7 Empty
F8 Empty
9 Engine management 10
10 10
11 10
12 10
13 Transmission control system (automatic transmission) (manual transmission (DSG) 15
14 Empty
15 Coolant pump motor 10
16 Steering column electrical control unit 5
17 instrument cluster 5
18 Audio system 30
19 Audio system, navigation system 15/25
20 Navigation system, telephone 5
21 Empty
22 Empty
23 Engine management 5/10
24 Diagnostic block 5
25 Empty
26 Empty
27 Exhaust Control Valve (BHZ) 5
28 Engine management 25
29 Coolant Pump Relay, Exhaust Air Pump Relay 5
30 Additional heater 20
31 windshield wiper 30
32 Empty
33 Empty
34 Empty
35 Empty
36 Empty
37 Empty
38 Cooling fan motor control unit, engine management system 10
39 Stop Lamp Switch (Brake Pedal Position Sensor), Clutch Pedal Position Sensor 5
40 Engine management 20
41 Empty
42  Engine management 5
43  Engine management 30
44 Empty
45 Empty
46 Empty
47 Multifunction control box 1 30/40
48 30/40
49 ^2007: Dashboard Fuse/Relay Box, MFC Relay 2 40
50 Empty
51 Engine management 40
52 ^2007: Instrument panel fuse/relay box, auxiliary circuit relay, multifunction control box 1. 40/50
53 ^2007 : Power Seats, Dashboard Fuse/Relay Box 50
54 Empty
R1 Main Ignition Relay
R2 Coolant pump relay (AXX/ B HZ/BMJ/ B PY/ B UB/BWA)
R3 Empty
R4 Fuel Pump Relay (BMJ/BUB)
Type #2  
1 Anti-Lock Braking System (ABS) 30
2 30
3 Multifunctional control box2 2
4 Multifunction control unit 1- except 3.2 (BDB) 5
5 Sound signal 20
6 Engine Management System - Gasoline 5/20/30
7  Stop Lamp Switch (Brake Pedal Position Sensor) 5
8 Cooling fan motor control unit, engine management system 10
9 Engine management 10
10 10
11 Engine management system - petrol 25
12 Engine management 15
13 Automatic transmission 20
14 Empty
15 Starter 40
16 Steering column electrical control unit 15
17 instrument cluster 10
18 Audio system 30
19 Audio system, navigation system 15
20 Telephone 5
21 Navigation system 10
22 Empty
23 Empty
24 Diagnostic unit, ignition switch 10
25 Empty
26 Engine Management System - Diesel 5
27 Crankcase ventilation heater 10
28 automatic transmission 20
29 Engine management 10/20
30 Additional heater 20
31 windshield wiper 25
32 Engine management 10
33 Fuel pump 15
34 Empty
35 Empty
36 Empty
37 Empty
38 Headlights corrector 10
39 Engine oil temperature sensor, instrument cluster 5
40  Fuse/Relay Box 1 Dashboard 30
41 Empty
42 Engine Management System - Gasoline 5
43 Vacuum pump for brake booster 20
44 Engine Management System - Diesel
45 Engine management 10/15
46 10
47 Multifunction control box 1 40
48 40
49 Relay 2 of the multifunction control unit 30
50 Empty
51 Engine management system - petrol 40
52 Multifunction control box 1 50
53 Dashboard Fuse/Relay Box 1 (F32-F37) - Except 3.2(BDB) 50
54 Cooling fan motor control unit 50
R1 Relay 2 main ignition circuits
R2 Starter relay
R3 Fuel pump relay-1.6(BGU)/3.2(BDB)
R4 Relay 1 Main Ignition Circuits
Type #3  
1 Anti-Lock Braking System (ABS) 30
2 30
3 Multifunction control box 2 20
4 Multifunction control unit 1 (except BDB/BMJ) 5
5 Sound signal 20
6 Engine management 15/20/30
7 Stop Lamp Switch (Brake Pedal Position Sensor), Clutch Pedal Position Sensor 5
8 Cooling fan motor control unit, engine management system 10
9 Coolant pump motor (if equipped), engine management system 10
10 Engine management 10
11 engine management system petrol) 25
12 Engine management 15
13 Transmission control system (automatic transmission) (manual transmission (DSG) 20
14 Empty
15 Starter 40
16 Steering column electrical control unit 15
17 instrument cluster 10
18 Audio system 30
19 Audio system, navigation system 15
20 Telephone 5
21 Navigation system 10
22 Empty
23 Empty
24 Diagnostic block 10
25 Empty
26 Engine management 5/10
27 Crankcase ventilation heater 5/10
28 Automatic transmission 20
29 Engine management 10/20
30 Additional heater 20
31 windshield wiper 30
32 Engine management 10
33 15
34 Empty
35 Empty
36 Empty
37 Empty
38 Headlights corrector 10
39 Engine Oil Condition Sensor 5
40 Dashboard Fuse/Relay Box 1 (F1-F11/F29-F31) (Except BDB/BMJ) 20/30
41 Engine management 10
42 5/10
43 Brake booster vacuum pump (if equipped) 20
44 Engine management 10
45 10/15
46 10
47 Multifunction control box 1 40
48 40
49 Passenger compartment fuse/relay box 1 (F1-F11/F29-F31) - (BDB/BMJ), MFC relay 2 30
50 Empty
51 Engine management 40
52 Interior fuse and relay box, auxiliary circuit relay, multifunction control box 1. 50
53 Dashboard Fuse/Relay Box 1 (F32-F37)-(BDB/BMJ) 50
54 Cooling fan motor control unit 50
R1 Relay 2 main ignition circuits
R2 Starter relay
R3 Fuel Pump Relay (BDB/BGU/BMJ)
R4 Relay 1 Main Ignition Circuits
Execution #2
No. Purpose A
SB1 ^2007: Multifunction control unit 2 20
SB2 Steering column electrical control unit 5
SB3 Multifunction control box 1 5
SB4 Anti-Lock Braking System (ABS) 30
SB5 Transmission control system (automatic transmission) (manual transmission (DSG) 15
SB6 Instrument cluster control unit 5
SB7 Empty  
SB8 Audio system, navigation system 15/25
SB9 Navigation system, telephone 5
SB10 Engine management 5/10
SB11 Additional heater 20
SB12 Diagnostic block 5
SB13 Engine management 25/30
SB14 20
SB15 5/10
SB16 Anti-Lock Braking System (ABS) 30
SB17 Sound signal 15
SB18 Audio system 30
SB19 windshield wiper 30
SB20 E/m the valve of management of a regulator of pressure of fuel (BPT/BPU/BYT) 20
SB21 Engine management 10/15
SB22 Stop Lamp Switch (Brake Pedal Position Sensor), Clutch Pedal Position Sensor 5
SB23 Coolant pump relay, engine management system 5/10
SB24 Cooling fan motor control unit (some models), engine management system 10
SB25 Multifunction control box 1 30/40
SB26 30/40
SB27 Exhaust Air Supply Pump (BSE) 40
SB28 ^2007 : Instrument Panel Fuse/Relay Box, Relay 2, MFC 40
SB29 ^2007 : Power Seats, Dashboard Fuse/Relay Box 50
SB30 ^2007 : Instrument panel fuse/relay box 1, auxiliary circuit relay, multifunction control box 1. 40/50
A1 Main Ignition Relay
A2 Exhaust Air Pump Relay(BSE)

Additional relay box

Only cars with diesel engines.

No. Purpose
1 Spare
2 glow plugs 
3 Spare
4
5 outlet air supply
6 coolant pump

Power fuses

Located on the battery.

No. Purpose A
Type 1
F1 Generator 150/200
F2 power steering 80
F3 Cooling fan motor 80
F4 Passenger compartment fuse/relay box 1, passenger compartment fuse/relay box 2 - BDB 80
F5 Additional heater 100
F6 Fuse and relay box 1 in the cabin (F12-F17 / F44-F45) -3.2 (BDB) 50
F7 Empty
Type 2
F1 Generator 150/200
F2 power steering 80
F3 Cooling fan motor control unit 50
F4 ^10/05 - Passenger compartment fuse/relay box 80
F5 11/05-07: Interior Fuse/Relay Box 80
F6 Empty
F7 Service vehicles 50/80
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