The BMW X3 (E83) is a compact luxury crossover SUV that is produced by the German automaker BMW from 2003 to 2010. It is the company’s first compact SUV, and it is designed to compete with the likes of the Audi Q5 and Mercedes-Benz GLK-Class. The X3 is available in two generations, with the first generation (E83) being produced from 2003 to 2010.
The BMW X3 (E83) is known for its performance, luxury features, and impressive handling. It features a range of advanced safety features, including front and side airbags, anti-lock brakes, stability control, and traction control. Additionally, the X3 is equipped with a range of advanced electrical components, including a fuse box and relay system that helps to regulate and control various electrical functions in the car.
Fuse Box and Relay System
The BMW X3 (E83) is equipped with a fuse box and relay system that is responsible for controlling and regulating various electrical functions in the car. The fuse box is located in the glove compartment, and it contains a range of fuses that are designed to protect different electrical components in the car. The fuses are color-coded and labeled to make it easy for drivers to identify the correct fuse in case of a malfunction.
The X3 also features a relay system that is responsible for controlling various electrical functions, including the power windows, headlights, and air conditioning. The relays are located in the engine compartment, and they are designed to regulate the flow of electricity to the different electrical components in the car. Drivers should regularly check the fuses and relays in their X3 to ensure that they are functioning properly and to avoid potential electrical problems.
Electrical Components
The BMW X3 (E83) features a range of advanced electrical components, including a premium sound system, climate control system, and navigation system. The premium sound system features a high-end audio system with a subwoofer, while the climate control system features dual-zone automatic temperature control for the driver and front passenger. The navigation system is equipped with a large LCD display and provides turn-by-turn directions to help drivers navigate to their destination.
Other electrical components in the X3 include power windows, power door locks, and a power sunroof. These features are controlled by the fuse box and relay system, and they help to enhance the overall driving experience for X3 owners.
(2003-2010) BMW X3 (E83) fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
BMW X3 (E83) 2003-2010 fuse assignment
Passenger Compartment Fuse Box
| No. | Amps | Assignment/Designation |
| 1 | – | – |
| 2 | – | – |
| 3 | – | – |
| 4 | – | – |
| 5 | 5A | Horn Relay |
| 6 | 5A | Front Left/Right Make-Up Mirror Light |
| 7 | 5A | Radio, Navigation System, Telephone Transceiver, Voice Control System, Eject Box (→09.2005), Basic Interface Telephone (Japan), Rear Seat Entertainment System (09.2005→) |
| 8 | – | – |
| 9 | 5A | Volute Spring, Light Switch Cluster (→08.2006), Light Module (09.2006→), Clutch Switch, General Module Control Unit, Brake Light Switch |
| 10 | 5A | Instrument Cluster Control Unit |
| 11 | 5A | Multiple Restraint System Control Unit, Airbag Indicator Light, Seat Occupancy Recognition |
| 12 | 7.5A | Centre Console Switch Centre |
| 13 | – | – |
| 14 | 5A | Electronic Vehicle Immobilizer (EWS) |
| 15 | 5A | Rain/Headlight Sensor, Rear Intermittent Wipe/Wash Control Unit |
| 16 | – | – |
| 17 | – | – |
| 18 | – | – |
| 19 | – | – |
| 20 | – | – |
| 21 | 7.5A | 09.2007→ (M57, N47, N52): Radiator Shutter Drive Unit |
| 22 | 5A | 09.2005→ (N47, M47, M57): Digital Diesel Electronics (DDE) Control Unit |
| 23 | 5A | Adaptive Headlight |
| 24 | 5A | Electrochromic Interior Rear View Mirror, Park Distance Control (PDC) |
| 25 | 5A | Outside Mirror (Passenger’s Side – Basic Mirror), Heated Spray Nozzles Thermal Switch (09.2003-02.2004) |
| 26 | 5A | Cigar Lighter Relay, Transfer Box Control Unit |
| 27 | 10A | Reversing Light Switch (Manual Transmission), Reversing Light Relay (Automatic Transmission) |
| 28 | 5A | Heating/Air Conditioning System, Rear Window Defogger Relay |
| 29 | 5A | M47: Digital Diesel Electronics (DDE) Control Unit |
| 5A | M54: Integrate Supply Module (IVM), Digital Motor Electronics (DME) Control Unit, Transmission Control | |
| 5A | N46, N52 (09.2006→): Digital Motor Electronics (DME) Control Unit, Terminal 15 Power-Saving Relay | |
| 30 | 7.5A | M47, N47, M57: Oil Level Sensor, Fuel Heater (except N47), Transmission Control (09.2005-08.2007), Data Link Connector (OBD II) |
| 31 | 5A | Driver’s Door Module, Terminal 15 Power-Saving Relay |
| 32 | 5A | Light Switch Cluster (→08.2006), Light Module (09.2006→) |
| 33 | 5A | Centre Console Switch Centre |
| 34 | 5A | Fuel Pump Control Unit (EKPS), Instrument Cluster Control Unit |
| 35 | 40A | Dynamic Stability Control (DSC) |
| 36 | 50A | N46, M54, N52: Secondary Air Pump Relay |
| 50A | M47, N47, M57: Fuel Heater, Transmission Control (09.2005→) | |
| 37 | 60A | Electric Fan (Engine Cooling System) |
| 38 | 15A | Fog Light Relay |
| 39 | 5A | Telephone Transceiver, Eject Box, Voice Control System, Compensator, Basic Interface Telephone (Japan) |
| 40 | 5A | Gear Indicator Lighting, Steering Angle Sensor (DSC) |
| 41 | 30A | Radio, Amplifier |
| 42 | 10A | Central Information Display (CID), Video Module, CD Changer, Satellite Receiver, Navigation System |
| 43 | 5A | Instrument Cluster Control Unit, Data Link Connector (OBD II) |
| 44 | 20A | Trailer Socket |
| 45 | 20A | Rear Intermittent Wipe/Wash Unit Control |
| 46 | 20A | Panorama Glass Roof |
| 30A | Panorama Glass Roof | |
| 47 | 20A | Front Cigar Lighter, Rear Cigarette Lighter, Luggage Compartment Power Socket |
| 48 | 30A | General Module Control Unit |
| 49 | 5A | General Module ControlUnit, Aerial Diversity |
| 50 | 40A | Blower Output Stage |
| 51 | 30A | Headlight Washer Relay, Terminal 15 Power-Saving Relay |
| 52 | 30A | General Module Control Unit |
| 53 | 25A | Dynamic Stability Control (DSC) |
| 54 | 20A | Fuel Pump Relay (without Electronically Controlled Fuel Pump), Fuel Pump Control Unit (EKPS – with Electronically Controlled Fuel Pump) |
| 55 | 15A | Horn Relay |
| 56 | 5A | →02.2007: Transmission Control |
| 7.5A | 03.2007→: Rear Seat Entertainment System | |
| 57 | 7.5A | Passenger’s Window Motor, Driver’s Window Motor, Driver’s Door Module, Rear Left Door Power Window Motor, Rear Right Door Power Window Motor, Driver’s Side Outside Mirror, Passenger’s Side Outside Mirror |
| 58 | 7.5A | →08.2006: Adaptive Headlight |
| 10A | 03.2007→: Driver’s Lumbar Support Switch, Passenger’s Lumbar Support Switch | |
| 59 | 30A | Windscreen Wiper Relay |
| 60 | 25A | General Module Control Unit |
| 61 | 30A | Centre Console Switch Centre |
| 62 | 7.5A | Heating/Air Conditioning System (Water Valve, Auxiliary Water Pump (N47, M47, M57)) |
| 63 | 7.5A | A/C Compressor Relay |
| 64 | – | – |
| 65 | 30A | Driver’s Seat Memory, Driver’s Lumbar Support Switch (→02.2007) |
| 66 | 10A | Ignition Switch, Steering Wheel Heating Control Unit |
| 67 | 5A | Electronic Vehicle Immobilizer (EWS), Siren and Tilt Alarm Sensor, Electrochromic Interior Rear View Mirror, Interior Movement Detector |
| 68 | 30A | Rear Window Defogger Relay |
| 69 | 5A | Servotronic, Tyre Pressure Control (RDC) |
| 70 | 30A | Passenger’s Seat Memory, Passenger’s Lumbar Support Switch (→02.2007) |
| 71 | 30A | General Module Control Unit |
| – | ||
| 72 | – | – |
| 73 | – | – |
 | ||
| 102 | 80A | N46, M54: B+ Potential Distributor |
| 80A | 09.2006→ (N52): Integrate Supply Module (IVM), Digital Motor Electronics (DME) Relay, Fuse No.: “08” | |
| 105 | 50A | Ignition Switch |
| 106 | 50A | Ignition Switch, Light Switch Cluster (→08.2006), Light Module (09.2006→) |
| 107 | 50A | Light Switch Cluster, Trailer Module |
- Petrol Engines:
N46B20 – 2.0i
N52B25 – 2.5si & xDrive25i
N52B30 – 3.0si & xDrive30i
M54B25 – 2.5i
M54B30 – 3.0i - Diesel Engines:
N47D20 – xDrive18d, 2.0d & xDrive20d
M47D20 – 2.0d
M57D30 – 3.0d, 3.0sd, xDrive30d & xDrive35d
Additional Fuses
| No. | Amps | Assignment/Designation |
Luggage Compartment Fuse Holder | ||
| Location | ||
| 80 | 40A | Transfer Box Control Unit |
| 81 | 30A | Amplifier (HiFi System Professional) |
| Main Fuse Box (Battery) | ||
| Location | ||
| 108 | 250A | Power Distribution (Passenger Compartment Fuse Box) |
| 109 | 40A | Transfer Box Control Unit |
| 60A | Fuse: “80 (40A – Transfer Box Control Unit)”, “81 (30A – Amplifier)” | |
| 203 | 100A | Jump Start Terminal Point (DDE Main Relay) |
Engine Compartment Fuse Box (N46, N47, N52) | ||
| Location | ||
| 01 | 20A | N46: Fuel Injectors |
| 20A | N47: Camshaft Sensor, Boost Pressure Adjuster, Rail Pressure Control Valve, Throttle Valve, Volume Control Valve | |
| 02 | 30A | N46 & N52 (09.2003→): Intake VANOS Solenoid Valve, Exhaust VANOS Solenoid Valve, Characteristic Map Cooling Thermostat, Individual Control Intake System Valve, Fuel Tank Vent Valve, Idle Actuator, Digital Motor Electronics (DME) Control Unit |
| 20A | 09.2005→ (N46): Digital Motor Electronics (DME) Control Unit, Hot-Film Air Mass Meter, Oil QualitySensor, Crankshaft Sensor, Fuel Tank Vent Valve, Crankcase Breather Heating | |
| 10A | 09.2006→ (N52): Exhaust Flap, A/C Compressor Relay, Diagnostic Module for Fuel Tank Leakage, Dynamic Stability Control (DSC), Rotation Rate Sensor, Steering Angle Sensor DSC, E-Box Fan, Fuse: “21” (09.2007→) | |
| 20A | N47: Exhaust Recirculation Actuator, Hot-Film Air Mass Meter, Oxygen Sensor before Catalytic Converter, Exhaust Recirculation Cooler Bypass Solenoid Valve, Preheating Control Unit | |
| 03 | 30A | 09.2005→ (N46): Oxygen Sensor before Catalytic Converter, Oxygen Sensor after Catalytic Converter |
| 30A | N47: Digital Motor Electronics (DME) Control Unit | |
| 04 | 10A | 09.2005→ (N46): Secondary Air Pump Relay, A/C Compressor Relay, Fuel Pump Relay, Dynamic Stability Control (DSC), Rotation Rate Sensor, Steering Angle Sensor DSC, E-Box Fan, Intake VANOS Solenoid Valve, Exhaust VANOS Solenoid Valve, Camshft Sensor 1 & 2, Characteristic Map Cooling Thermostat |
| 30A | N52: Oxygen Sensor 1 & 2 before Catalytic Converter, Oxygen Sensor 1 & 2 after Catalytic Converter, Crankshaft Breather Heating | |
| 05 | 30A | 09.2005→ (N46): Terminal 15 Power-Saving Relay |
| 06 | – | – |
| 07 | ||
| 08 | 30A | 09.2006→ (N52): Electric Coolant Pump |
| 09 | ||
| 1 | 40A | →09.2005 (N46): Variable Valve Timing Gear Relay |
Engine Compartment Fuses(M54) | ||
| Location | ||
| 01 | 30A | Ignition Coils |
| 02 | 30A | Intake VANOS Solenoid Valve, Exhaust VANOS Solenoid Valve, Characteristic Map Cooling Thermostat, Individual Control Intake System Valve, Fuel Tank Vent Valve, Idle Actuator, Digital Motor Electronics (DME) Control Unit |
| 03 | 20A | Reversing Light Relay, Hot-Film Air Mass Meter, Crankshaft Sensor, Camshaft Sensor 1 & 2, Secondary Air Pump Relay, Secondary Air Hot-Film Air-Mass Meter, Fuel Pump Relay, Exhaust Flap, A/C Compressor Relay, E-Box Fan, Rotation Rate Sensor, Steering Angle Sensor DSC, Diagnostic Module for Fuel Tank Leakage, Dynamic Stability Control (DSC) |
| 04 | 30A | Oxygen Sensor 1 & 2 before Catalytic Converter, Oxygen Sensor 1 & 2 after Catalytic Converter, Transmission Control |
| 05 | 30A | Fuel Injectors Relay |
Engine Compartment Fuses (M47) | ||
| Location | ||
| 01 | 20A | Camshaft Hall-Effect Sensor, Hot-Film Air Mass Meter, Rail Pressure Control Valve, Volume Control Valve, Boost Pressure Control Solenoid Valve, Crankcase Breather Heating, Throttle Valve (EU4), Boost Pressure Adjuster (EU4) |
| 02 | 20A | Exhaust Gas Recirculation Solenoid Valve, Swirl Flaps Electric Changeover Valve, Preheating Control Unit, Oxygen Sensor before Catalytic Converter (EU4) |
| 03 | 30A | Digital Motor Electronics (DME) Control Unit |
| 04 | 10A | Electric Auxiliary Heater, Fuel Pump Relay, A/C Compressor Relay, Steering Angle Sensor (DSC), Crankcase Breather Heating, Dynamic Stability Control (DSC), Rotation Rate Sensor, E-Box Fan |
| 05 | – | – |
Engine Compartment Fuses (M57) | ||
| Location | ||
| 01 | 20A | →08.2005: Camshaft Hall-Effect Sensor, Hot-Film Air Mass Meter, Rail Pressure Control Valve, Volume Control Valve, Boost Pressure Control Solenoid Valve, Crankcase Breather Heating |
| 20A | 09.2005→: Hot-Film Air Mass Meter, Camshaft Hall-Effect Sensor, Boost Pressure Adjuster (→08.2006), Oxygen Sensor before Catalytic Converter, Throttle Valve (EU4), Volume Control Valve, Rail Pressure Control Valve, Turbine Control Valve (09.2006→) | |
| 02 | 20A | Exhaust Gas Recirculation Solenoid Valve, Reversing Light Relay (→08.2005), Swirl Flaps Electric Changeover Valve (EU3), Swirl Flap Actuator (EU4), Preheating Control Unit, Engine Mount Electrical Changeover Valve, Oxygen Sensor before Catalytic Converter (→08.2005), Exhaust Recirculation Cooler Bypass Solenoid Valve (09.2005→) |
| 03 | 30A | Digital Motor Electronics (DME) Control Unit |
| 04 | 10A | Electric Auxiliary Heater, Fuel Pump Relay, A/C Compressor Relay, Steering Angle Sensor DSC, Dynamic Stability Control (DSC), Rotation Rate Sensor, E-Box Fan, Crankcase Breather Heating (09.2005-08.2006), Fuse No.: “21” (09.2007→) |
| 05 | 30A | Transmission Control |
The BMW X3 (E83) is a luxury SUV that offers a range of advanced features and impressive handling. Its electrical system, including the fuse box and relay system, is a crucial component that helps to regulate and control various electrical functions in the car. By regularly checking and maintaining the fuses and relays, X3 owners can ensure that their car’s electrical system is functioning properly and avoid potential electrical problems. With its advanced features and impressive performance, the BMW X3 (E83) remains a popular choice among luxury SUV buyers.
