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Fuse box diagram (fuse layout), location and assignment of fuses and relays of BMW 3-Series E46 (1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006) 316, 318, 320, 323, 325, 328, 330 and M3.
Checking and Replacing Fuses
The wiring circuits in the vehicle are protected from short circuits by fuses. This greatly reduces the chance of damage caused by electrical problems.
To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a new one of the identical size and rating.
Fuses of the same amperage can be temporarily borrowed from another fuse location if a fuse goes out. Replace the fuse as soon as possible.
Note
- Before replacing a fuse check that the key has been removed from the ignition and that all the services are switched off and/or disengaged.
- When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. The use of a fuse with a rating other than indicated may result in a dangerous electrical system overload.
- If a properly rated fuse continues to blow, it indicates a problem in the circuit that must be corrected.
Passenger Compartment Fuse Box Diagram
You will find the fuses and information on their respective allocation in the glove compartment behind a panel with two snap clips.
| № | A | Protected components |
|---|---|---|
| 1 | - | - |
| 2 | - | - |
| 3 | - | - |
| 4 | - | - |
| 5 | 5 | Horn relay |
| 6 | 5 | Make-up mirror light, driver’s side |
| Make-up mirror light, passenger’s side | ||
| Convertible soft top control unit | ||
| 7 | 5 | Radio control unit |
| Aerial amplifier AM/FM (with remote control central locking) | ||
| On-board monitor control unit | ||
| Spatial sound switch | ||
| Interface | ||
| Navigation computer | ||
| GPS receiver | ||
| Transceiver/charging electronics | ||
| Pushbutton, convertible soft top closed | ||
| Basic interface telephone | ||
| Voice input | ||
| Diversity | ||
| Eject box | ||
| Telematics control unit (TCU-Everest) | ||
| Universal electronic charging and hands-free module (ULF) | ||
| 8 | 5 | Sequential mechanical gear |
| 9 | 5 | up to 03.2001 (BMS46): |
| General module control unit | ||
| Light switching centre control unit | ||
| Cruise control module | ||
| Brake light switch | ||
| Volute spring | ||
| 03.1998-09.1999 (MS42 or DDE3.0): | ||
| Volute spring | ||
| General module control unit | ||
| Brake light switch | ||
| Light switching centre control unit | ||
| 09.1999-03.2001 (MS42, MS43, MSS54, DDE3.0, DDE4.0): | ||
| Volute spring | ||
| General module control unit | ||
| Brake light switch | ||
| Light switching centre control unit | ||
| Clutch switch | ||
| as of 03.2001: | ||
| Volute spring | ||
| General module control unit | ||
| Brake light switch | ||
| Light switching centre control unit | ||
| Clutch switch module | ||
| 10 | 5 | Instrument cluster control unit |
| 11 | 5 | Multiple Restraint System II: |
| Sensor for LH side airbag (satellite) | ||
| Sensor for RH side airbag (satellite) | ||
| Multiple restraint system control unit | ||
| Hall sensor, driver’s seat belt buckle | ||
| Hall sensor, passenger’s seat belt buckle (USA) | ||
| Electronic seat control | ||
| Multiple Restraint System III/IV: | ||
| Multiple restraint system control unit | ||
| Hall sensor, driver’s seat belt buckle | ||
| Electronic seat control | ||
| Hall sensor, passenger’s seat belt buckle (USA) | ||
| 12 | 7.5 | 03.1998-09.1999: Sun shade switch |
| as of 09.1999: Switch center | ||
| 13 | 7.5 | as of 03.2000: Rollover sensor |
| 14 | 5 | Electronic immobiliser control unit |
| Gearshift lock | ||
| 15 | 5 | Rain sensor |
| Intermittent wipe/wash control unit, rear (Touring) | ||
| 16 | - | - |
| 17 | - | - |
| 18 | - | - |
| 19 | - | - |
| 20 | - | - |
| 21 | - | - |
| 22 | 5 | S54: Sequential mechanical gear box |
| M47/TU and M57/TU: Digital diesel electronics control unit | ||
| 23 | 5 | Auxiliary water pump |
| 24 | 5 | Electrochromic interior rear-view mirror |
| Park distance control unit (PDC) | ||
| 25 | 5 | Outside mirror, passenger’s side |
| Thermal switch, heated spray nozzles | ||
| 26 | 5 | Garage door opener |
| 27 | 10 | Reversing light relay |
| Gear position switch (BMS46 with EGS 8.34) | ||
| Transmission control unit (BMS46 with GM5) | ||
| 28 | 5 | Heating and A/C control module |
| Heating blower relay | ||
| Relay, A/C compressor | ||
| Dual-function switch recirculated air/rear window defogger | ||
| Temperature switch | ||
| Rear window defogger relay (convertible) | ||
| 29 | 5 | Digital motor electronics control unit (BMS46, MS42, MS43, MSS54) |
| Unloader relay terminal 15 (BMS46, ME9) | ||
| Digital diesel electronics control unit (DDE3.0, DDE5) | ||
| Transmission control unit (ME9 with Automatic transmission) | ||
| 30 | 7.5 | Oil level sensor |
| Alternator | ||
| Temperature switch (up to 09.1998; MS42) | ||
| Transmission control unit | ||
| Data link connector | ||
| Diesel: | ||
| Oil level sensor | ||
| Data link connector | ||
| Transmission control unit (as of 06.2000; DDE3.0) | ||
| 31 | 5 | 03.1998-09.1998: Mirror adjustment switch |
| 09.1998-09.2001: Tyre pressure control system control unit | ||
| as of 09.2001: | ||
| Mirror adjustment switch | ||
| Control unit, tyre defect indicator (RPA) (all-wheel drive with DDS) | ||
| Tyre pressure control system control unit (without all-wheel drive with DDS) | ||
| 32 | 5 | without Xenon lights: Light switching centre control unit |
| Xenon lights: | ||
| Light switching centre control uni | ||
| Xenon headlight, left | ||
| Xenon headlight, right | ||
| Control unit for adaptive headlight (03.2003-09.2003; Convertible and Coupe) | ||
| Xenon lights (as of 09.2003): | ||
| Light switching centre control uni | ||
| Control unit for adaptive headlight (Convertible) | ||
| 33 | 5 | 03.1998-09.1999: |
| ASC/DSC button | ||
| ABS/DSC unit (with DSC) | ||
| without all-wheel: | ||
| Switch center | ||
| Steering angle sensor (with DSC) | ||
| ABS/DSC unit | ||
| up to 03.2001 (all-wheel drive): | ||
| Switch center | ||
| Steering angle sensor, DSC | ||
| ABS/DSC unit | ||
| as of 03.2001 (all-wheel drive): Switch center | ||
| 34 | 5 | Instrument cluster control unit |
| Fuel pump control (EKPS) (only MS45) | ||
| 35 | 50 | all-wheel drive: ABS/DSC unit |
| Convertible: Relay, convertible top drive | ||
| 36 | 50 | Secondary air pump relay |
| 37 | 50 | 03.1998-09.1998: Heating blower relay |
| 09.1998-09.1999: | ||
| Blower switch (with IHS) | ||
| Blower output stage (with IHKA) | ||
| as of 09.1999: Electric fan | ||
| 38 | 10 | Fog light relay |
| 39 | 5 | Transceiver/charging electronics |
| Motorola (03.1998-09.1999): Transceiver/charging electronics | ||
| Nokia: | ||
| Transceiver/charging electronics (up to 09.1999) | ||
| Compensator | ||
| Basic interface telephone (as of 09.1999) | ||
| Voice input (as of 09.1999) | ||
| Telephone provision: | ||
| Transceiver/charging electronics | ||
| Compensator | ||
| JBIT: Basic interface telephone | ||
| 10 | Siemens: | |
| Voice input | ||
| Basic interface telephone | ||
| Eject box | ||
| Motorola (as of 06.2000): | ||
| Voice input | ||
| Compensator | ||
| Transceiver/charging electronics | ||
| Interface | ||
| Telematics Control Unit: | ||
| Voice input | ||
| Telematics control unit (TCU-Everest) | ||
| Eject box | ||
| Aerial splitter (Coupe, Convertible as from 2004_09) | ||
| ULF: | ||
| Compensator | ||
| Universal electronic charging and hands-free module (ULF) | ||
| 40 | 5 | without all-wheel (up to 09.2001): Gear indicator light |
| without all-wheel (as of 09.2001): | ||
| Steering angle sensor, DSC | ||
| Gear indicator light (only USA) | ||
| all-wheel drive: Steering angle sensor, DSC | ||
| 41 | 30 | On-board monitor control unit |
| Amplifier | ||
| Radio control unit | ||
| CD changer | ||
| Subwoofer box | ||
| Navigation computer | ||
| Video module control unit | ||
| Switch center | ||
| 42 | 30 | Switch center |
| 43 | 5 | Instrument cluster control unit |
| Data link connector (only USA) | ||
| 44 | 20 | Trailer socket |
| 45 | 20 | Touring: Intermittent wipe/wash control unit, rear |
| 46 | 20 | Convertible soft top control unit |
| Sunroof module control unit | ||
| Relay, convertible top 1 | ||
| 47 | 15 | up to 03.1999: Cigarette lighter, front |
| 20 | as of 03.1999: | |
| Cigarette lighter, front | ||
| Oddments compartment, left (except Touring) | ||
| Oddments compartment, right (except Touring) | ||
| 12 V socket | ||
| 48 | 30 | General module control unit |
| 49 | 5 | General module control unit |
| Aerial amplifier AM/FM (with remote control central locking) | ||
| 50 | 25 | up to 09.1999: Ignition switch |
| 40 | as of 09.1999: | |
| Blower switch (with Heater control) | ||
| Blower output stage (without Heater control) | ||
| 51 | 30 | Headlight washer module |
| 52 | 30 | General module control unit |
| 53 | 30 | ABS/ASC unit |
| 54 | 15 | Fuel pump relay 1 |
| 25 | DDE4.0: Fuel pump relay 1 | |
| 20 | DDE5.0: Fuel pump relay 1 | |
| MS45: Fuel pump control (EKPS) | ||
| 55 | 15 | Horn relay |
| 56 | 30 | ABS/ASC unit |
| 57 | 5 | Outside mirror fold-in control unit |
| Mirror memory control unit, driver’s side (up to 03.2003) | ||
| Mirror memory control unit, front passenger’s side (up to 03.2003) | ||
| Driver’s side outside mirror with memory (as of 03.2003) | ||
| Passenger’s side out-side mirror with memory (as of 03.2003) | ||
| Mirror memory control unit, driver’s side (as of 03.2003; Coupe, Convertible) | ||
| Mirror memory control unit, front passenger’s side (as of 03.2003; Coupe, Convertible) | ||
| Power window motor, driver’s door with anti-trap protection function (as of 03.2003; Compact, Convertible with SPMFT) | ||
| Power window motor, passenger’s door with anti-trap protection function (as of 03.2003; Compact, Convertible with SPMFT) | ||
| 58 | 7.5 | Touring: Relay, rear window drive |
| as of 03.2003; (Coupe, Convertible): Control unit for adaptive headlight | ||
| 59 | 30 | Wiper relay |
| 60 | 25 | General module control unit |
| 61 | 30 | ABS/DSC unit |
| 62 | 7.5 | Water valves |
| 63 | 7.5 | Relay, A/C compressor |
| 64 | 20 | Independent park heating control unit |
| 5 | DDE5: Transmission control unit | |
| 65 | 30 | 03.1998-09.1999: |
| Driver’s seat memory control unit | ||
| Driver’s lumbar support switch | ||
| as of 09.1999: | ||
| Driver’s seat adjustment switch | ||
| Driver’s lumbar support switch (convertible) | ||
| 66 | 5 | MS43 with SMG: Ignition switch |
| 67 | 5 | Electronic immobiliser control unit |
| Electrochromic interior rear-view mirror | ||
| Control unit, interior protection I | ||
| Control unit, interior protection II (convertible) | ||
| Tilt monitoring | ||
| Horn for antitheft alarm system | ||
| 68 | 30 | Rear window defogger relay |
| 69 | 5 | Tyre pressure control system control unit |
| 70 | 30 | with SMF (Saloon, Touring): Seat adjustment switch, front passenger’s seat |
| without SMF (Saloon, Touring): Passenger’s lumbar support switch | ||
| Compact, Coupe: Control unit, front passenger seat memory | ||
| Convertible: | ||
| Control unit, front passenger seat memory | ||
| Passenger’s lumbar support switch | ||
| 71 | 30 | 4-door: General module control unit |
| 10 | 2-door: General module control unit | |
| 72 | - | - |
| 73 | - | - |
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Additional Fuses behind Glovebox
| № | A | Protected components |
|---|---|---|
| 101 | 50 | 03.1998-09.1998: Electric fan |
| 102 | 80 | MSS54: |
| Fuse carrier, engine electronics (fuse №5 (30A)) | ||
| DME relay | ||
| Digital motor electronics control unit | ||
| SMG control unit | ||
| MS43: | ||
| Fuse carrier, engine electronics (fuse №5 (30A)) | ||
| DME relay | ||
| Digital motor electronics control unit | ||
| Transmission control unit | ||
| BMS46, MS42: B+ terminal | ||
| ME9: B+ potential distributor | ||
| 103 | - | - |
| 104 | 100 | Preheater relay |
| 105 | 50 | Ignition switch |
| Diagnosis plug | ||
| 106 | 50 | Ignition switch |
| Light switching centre control unit | ||
| 107 | 50 | Trailer module |
| Light switching centre control unit |
Relay behind Glovebox
| № | Relay |
|---|---|
| K2 | Horn relay |
| K4 | 03.1998-09.1998: Heating blower relay IHS |
| K19 | as of 09.1998: Relay, A/C compressor |
| K47 | Fog light relay |
| K96 | Fuel pump relay 1 |
Rear Pre-Fuse Box
| № | A | Protected components |
|---|---|---|
| 108 | 200 | Fuse: 35-71, 101-107 |
| 203 | 100 | DDE relay |
| Fuse carrier, engine electronics (fuse №4 (30A) - DDE4.0 or EGS Transmission control GM5) |
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