Fuses and relays BMW E46 (3 Series, 1998 - 2007)

BMW E46 is the fourth generation of the 3rd series of passenger cars of the German automaker. A large range of engines, five body types to choose from, plus sporty modifications ensured the commercial success of this generation. In this article we will understand in detail fuse box diagrams BMW e46 (3rd series; 4th gen; 316Ci, 316i, 316ti, 318d, 318i, 320d, 320i, 323i, 325i, 325xi, 328i, 330d, 330i, 30xd, m3) 1998, 1999, 2000, 2001, 2002, 2003, 2003, 2004, 2004, 2005, 2006, 2007 years of manufacture.

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

In the engine compartment

There is one main unit here, as well as separately placed relay modules.

Fuse box

The location of the fuse box in the engine compartment of the car
Located in the rear of the engine compartment, next to the windshield wipers.

Access example.

No. Decryption A
F1 Ignition coils - 320iсMS43 / 325i / 330i 30
F2 ECM, Reverse Light(s) Relay, TCM - 316i / 318i 30
F3 Air flow sensor, crankshaft position sensor, reversing light(s) relay, cooling system thermostat, camshaft position sensor 1, camshaft position sensor 2 - 320i / 325i / 330i 20
F4 Fuel pump relay, exhaust air pump relay, air conditioner compressor solenoid relay - 316i / 318i / 330i 30
F5 Ignition Coil Relay - 316i / 318i / 320i / 323i / 328i 30
1 Engine ECU
2 transmission control unit
3 Windshield wiper motor relay
4 engine management system - gasoline
5 engine management system - Diesel
6 Reverse lamp relay


Location of individual relays in the underhood.

No. Purpose
R1 variable valve timing relay
R2 DDE main relay
R3 heating relay
R4 Hydraulic pump
R5 DME relay
R6 Wiper relay
R7 hydraulic pump relay
R8 reversing lamp
R9 Unloader relay, terminal 15
R10 fuel injectors

In the passenger compartment

Fuse box

Location of the main fuse box in the passenger compartment
It is located on the passenger side behind the glove box. There are some relays located on the back of it.

General view of the BMW E46 interior fuse box. 

No. Decryption A
5 Horn (beep) relay 5
6 Illumination lamps for cosmetic mirrors, folding roof drive control unit 5
7 Folding roof drive switch, navigation system control unit, audio system output amplifier, multifunction display, telephone, audio system 5
8 Sequential manual transmission - M3 5
9 Steering wheel controls - speed maintenance system, brake light switch (brake pedal position sensor), multifunction control unit, light switch, clutch pedal position sensor 5
10 instrument cluster 5
11 SRS electronic control unit, power seats, seatbelt warning system 5
12 Multifunction switch assembly 7.5
13 Safety arc drive control unit 7.5
14 Electronic immobilizer control unit, automatic transmission shift interlock switch 5
15 Rain sensor, rear window wiper/washer
22 Sequential manual transmission - M3 5
23 Coolant Pump Motor - Diesel 5
24 Interior rearview mirror with auto-dimming, parking system control unit 5
25 Electric rear view mirror on the door (passenger side), temperature switch (heated windshield washer nozzles) 5
26 Garage Door Remote Control System 5
27 Reverse Lamp(s) Relay, Transmission Shift Sensor 10
28 Electronic air conditioner control unit, air conditioner compressor solenoid clutch relay 5
29 ECM, ignition coil relay 5
30 Alternator, engine oil level sensor, diagnostic connector -16-pin 7.5
31 Tire pressure monitoring control unit 5
32 Light switch, headlight control unit - left (xenon headlights), headlight control unit - right (xenon headlights) 5
33 Multifunction switch, ABS-ECU with ASC, steering wheel position sensor 5
34 instrument cluster 5
35 Folding roof drive motor relay 50
36 Exhaust air pump relay 50
37 Cooling fan motor 50
38 Fog lamp relay 10 / 15
39 Telephone, voice synthesizer 5
40 Transmission selector illumination lamp, steering wheel position sensor - DSC 5
41 Multifunction display, audio output amplifier, CD changer, audio system, navigation system control unit 30
42 Multifunction switch assembly 30
43 instrument cluster 5
44 Trailer electrical connector 20
45 Rear window cleaner/washer 20
46 Folding sunroof drive control unit, sunroof control unit, folding sunroof cover drive motor relay 20 / 30
47 BMW 3 e46 cigarette lighter fuse - front, accessory connector 20
48 Multifunction control box 30
49 Multifunction control unit, audio output amplifier 5
50 Air conditioner/heater fan motor switch 40
51 Headlight washer control unit 30
52 Multifunction control box 30
53 ABS electronic control unit 30
54 Fuel pump relay (BMW E46 fuel pump fuse) 15/20
55 Horn relay 15
56 ABS electronic control unit 30
57 Mirror folding control unit, door mirror drive control unit (driver's side), door mirror drive control unit (passenger's side) 5
58 Rear Door Power Relay 7.5
59 Windshield wiper motor relay 30
60 Multifunction control box 25
61 Electronic control unit DBS-DSC system 30
62 Heater coolant regulator valve 7.5
63 Air conditioner compressor solenoid clutch relay 7.5
64 Additional heater control unit 20
65 Driver's seat adjustment switch block 30
67 Electronic immobilizer control unit, auto-dimming interior rearview mirror, anti-theft system control unit (with volume change control), vehicle tilt sensor (anti-theft system), anti-theft system buzzer 5
68 Rear window heater relay 30
69 Tire pressure monitoring control unit 5
70 Passenger seat adjustment switch assembly 30
71 Multifunction control box 10 / 30
Relay on the back of the block
1 fuel pump relay
2 heater fan
3 fog lights
4 horn
Power fuses in the passenger compartment box
No. Decryption A
F101 Cooling fan motor 50
F102 Engine Control System Relay, ECM, TCM, Fuse/Relay Box Rear ^5) 80
F104 Glow plug control unit 100
F105 Starter switch, diagnostic connector -20-pin 50
F106 Starter switch, light switch 50
F107 Light switch, trailer electrical control unit 50


Placement of individual relays in the passenger compartment.

No. Purpose
R1 fan relay or not used
R2 Headlight washer relay
R3 A/C compressor or not used
R4 rear power windows
R5 secondary air pump relay
R1 Fuel module relay (fuel pump) / or empty
R2 Rear window heater relay
R3 moisture trap

All electrical equipment

General layout of electronic components in the vehicle.
1. Air conditioner compressor solenoid clutch relay - behind the instrument panel, right-hand side;
2. Electronic air conditioner control unit;
3. Sunlight sensor (air conditioning system);
4. Antenna signal amplifier - rear pillar;
5. Antenna signal booster - left side of luggage compartment - Convertible;
6. Antenna signal amplifier - under the rear spoiler - station wagon;
7. Side impact sensor - driver's side, under the seat (under the mat);
8. Side impact sensor - on the passenger side, under the seat (under the mat);
9. Vehicle tilt sensor (anti-theft system) - right side of the luggage compartment;
10. Anti-theft alarm system horn - intake system resonator;
11. Anti-theft system control module (with volume change control) - roof panel;
12. Anti-theft alarm system switch, hood - engine compartment, right rear - in the mounting block;
13. Audio output amplifier - behind the rear left trim panel - Cabriolet;
14. Audio output amplifier - left-hand side of the luggage compartment;
15. Auxiliary heater control module;
16. Battery pack - engine compartment, rear right-hand side - 4 cylinder engines;
17. Battery pack - right side of luggage compartment -6 cylinder engines/Diesel;
18. Trunk lid/rear door release switch - left lower protective panel;
19. Motor relay for the folding sunroof lid drive motor - behind the instrument panel, right-hand side.;
20. Roof folding control module - behind the rear left-hand side trim panel;
21. Folding roof drive relay - left-hand side of the luggage compartment;
22. Diagnostic connector (DLC);
23. Diagnostic connector (DLC) - behind the instrument panel, near the steering column(05/00^);
24. Rearview mirror control module, driver's side;
25. Rearview mirror control module, passenger's side;
26. Mirror folding control module - behind the duffel box;
27. Underhood fuse and relay box;
28, 29, 30. Fuse and relay boxes in the passenger compartment behind the duffel box ;
31. Headlamp washer control module - behind the dashboard, right-hand side;
32. Rear window heater relay - right-hand side of luggage compartment, front;
33. Rear window heater relay 1 - behind the right-hand rear trim panel - Convertible;
34. Rear window heater relay 2 - behind the rear right-hand side trim panel - Convertible;
35. Heater fan relay - behind the center console;
36. Horn 1;
37. Horn 2;
38. Electronic immobilizer control unit - near the steering column;
39. Immobilizer ring antenna - near the ignition switch;
40. Instrument cluster control module - behind the instrument panel;
41. Lighting control module - functions: Emergency alarm relay, light switch, indicator relay, instrument cluster illumination rheostat;
42. Multifunction switch assembly;
43. Multifunction control module - behind the glove compartment - functions: Anti-theft system, auto-dimming rearview mirror, audio system, central locking, power windows, hazard warning lights, interior lamps, SRS electronic control unit, tail lights, sequential automatic transmission, windshield wiper/washer;
44. Navigation system control module - left-hand side of the luggage compartment;
45. Navigation system antenna - behind the instrument cluster;
46. Parking system control module - right-hand side of the luggage compartment;
47. Parking system buzzer - left front legroom;
48. Rain sensor;
49. Additional fuses - luggage compartment - on the suspension cup;
50. Power seat control module - under the seat, driver's side;
51. Power seat control module - under the seat, passenger side;
52. Exhaust air pump relay - behind the right-hand side of the dashboard;
53. Power sunroof control module - ceiling panel;
54. SRS control module - under the mat;
55. Body height sensor (front), headlight corrector - wheel arch of the front right wheel;
56. Body height sensor (rear), headlight corrector - wheel arch of the rear right wheel.;
57. Telephone interface control module-under center console, rear.;
58. Trailer electrical control module - right-hand side of the luggage compartment;
59. Electronic control module for the transmission - engine compartment - in the mounting box;
60. Tire pressure monitoring system control module - behind the luggage compartment;
61. Vehicle speed sensor - right rear wheel speed sensor;
62. Windshield washer nozzle temperature sensor - under the underbody (front).

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Thanks so much for helping how to locate fuse boxs on BMW Engines

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