Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2018 BMW X5 xDrive50iFACTORY OEM SERVICE PROCEDURE
Engine Electrical System - Repair
- Safety And General Information
- 00 Safety information for working on vehicles with automatic engine start-stop function (MSA)
- 61 00... Safety information on handling hybrid cars
- 12 00... Instructions for working on the ignition system
- 61 20... Battery replacement information
- 61 13... Butt connector for repairing a plug connection
- 11 00... Handling components after flood damage
- 12 00... Instructions for removal and replacement of control units
- 61 00... Notes for disconnecting and connecting battery
- 61 13... Notes for opening contacts and locks of different plug contact systems
- 61 00... Notes on handling wiring harnesses and cables
- 12 00... Notes/information on start assistance (jump starting)
- 12 Removing and installing/replacing ignition coil cover (N55)
- 61 13... Unlocking and disconnecting various plug connections in electrical and hybrid vehicles
- Spark Plugs
- Ignition Coil
- Electronic Switching Or Control Units
- 12 14 700 Encoding the control unit (DME/DDE)
- 12 14 705 Programming the control unit (DME/DDE)
- 12 14 611 Removing/replace knock sensors at left (N63 B40/B44 O 1, S63 B44 T 2)
- 12 14 602 Removing/replacing knock sensor (1st and 2nd cylinder) (N20 hybrid drive)
- 12 14 604 Removing/replacing knock sensor (3rd and 4th cylinders) (N20 hybrid drive)
- 12 14 600 Removing/replacing knock sensors (N55)
- 12 14 610 Removing/replacing the knock sensors on the right (N63 B40/B44 O 1, S63 B44 T 2)
- 12 14 523 Replacing pulse sensor on intake camshaft (N20 hybrid drive)
- 12 14 521 Replacing pulse sensor on the crankshaft (N20 hybrid drive)
- 12 14 555 Replacing the control unit (DME) for cylinders 1-4 (N63 B40/B44 O 1)
- 12 14 556 Replacing the control unit (DME) for cylinders 5-8 (N63 B40/B44 O 1)
- 12 14 650 Replacing the vacuum pressure sensor on the pressure pipe (N20 hybrid drive)
- 12 14 550 Replacing control unit (DME) (N20 hybrid drive)
- 12 14 550 Replacing control unit (DME) (N55)
- 12 14 521 Replacing crankshaft pulse sensor (N55)
- 12 14 650 Replacing differential pressure sensor on intake plenum (N55)
- 12 14 524 Replacing pulse sensor on exhaust camshaft (N20 hybrid drive)
- 12 14 524 Replacing pulse sensor on exhaust camshaft (N55)
- 12 14 523 Replacing pulse sensor on intake camshaft (N55)
- 12 14 522 Replacing pulse sensor on left exhaust camshaft (N63 B40/B44 O 1)
- 12 14 512 Replacing pulse sensor on left exhaust camshaft (N63 B40/B44 O 1)
- 12 14 513 Replacing pulse sensor on right exhaust camshaft (N63 B40/B44 O 1)
- 12 14 526 Replacing pulse sensor on right intake camshaft (N63 B40/B44 O 1)
- 12 14 521 Replacing the pulse sensor on the crankshaft (N63 B40/B44 O 1, S63 B44 T2)
- 12 14 650 Replacing the suction pressure sensor on the intake plenum (N20 hybrid drive)
- Preheating Relay (Diesel)
- Glow Plugs (Diesel)
- Alternator
- Electric Machine Control (PHEV)
- 61 00... Safety information on handling hybrid cars
- 61 13... Unlocking and disconnecting various plug connections in electrical and hybrid vehicles
- 61 25 900 Disconnect high-voltage system from power
- 12 36 018 Removing/installing electrical machine electronics (EME)
- 12 36 610 Replacing the electrical machine electronics (EME)
- Starter
- 11 00... Handling components after flood damage
- 12 41 020 Removing and installing or replacing the starter motor (N63 B40/B44 O 1, S63 B44 T 2)
- 12 41 020 Removing and installing/replacing starter (N57 D30 O/T 1)
- 12 41 020 Removing and installing/replacing starter motor (N55)
- 12 41 031 Removing and installing/replacing toothed belt starter motor (N20 hybrid drive)
- 12 41 041 Replacing the engagement solenoid switch
- Starter And Alternator Cables
- 12 42 500 Replacing positive battery cable between starter motor, alternator and positive battery connection point (N55)
- 12 42 500 Replacing positive battery cable between starter motor, alternator and positive battery connection point (N57 D30 O/T/S 1)
- 12 42 500 Replacing positive battery cable between toothed belt starter motor and positive battery connection point (N20 hybrid drive)
- 12 42 540 Replacing safety battery terminal (SBK)
- Engine Wiring Harness
- 61 00... Safety information on handling hybrid cars
- 61 25 900 Disconnect high-voltage system from power
- 12 51 320 Removing holder for engine wiring harnesses (N63 B40/B44 O 1, S63 B44 T 2)
- 12 51 235 Removing and installing/replacing wiring harness for engine sensor system module 1 (N20 hybrid drive)
- 12 51 240 Removing and installing/replacing wiring harness for engine sensor system module 2 (N20 hybrid drive)
- 12 51 245 Replacing wiring harness section for engine and transmission module (N20 hybrid drive)
- 12 51 210 Replacing wiring harness section for ignition and injectors (N20 hybrid drive)
- 12 51 215 Replacing wiring harness section for Valvetronic servomotor (N20 hybrid drive)
- 12 51 001 Replacing wiring harness section for engine (N55)
- 12 51 001 Replacing wiring harness section for engine (N57 D30 O/T 1)
- 12 51 100 Replacing wiring harness section for ignition and injectors (N55)
- 12 51 200 Replacing wiring harness section for injectors (N57 D30 O T 1)
- Oil Pressure Sensor, Oil Temperature Sensor, Oil Level Sensor
- 12 61 285 Removing and installing/replacing the oil-level sensor for engine oil (N20 hybrid drive)
- 12 61 280 Removing and installing or replacing the oil pressure sensor (N63 B40/B44 O 1, S63 B44 T 2)
- 12 61 285 Removing and installing/renewing oil level sensor for engine oil (N55)
- 12 61 588 Removing and installing/replacing engine oil pressure/temperature sensor (N20 hybrid drive)
- 12 61 285 Removing and installing/replacing oil level sensor for engine oil (N57 D30 O/T 1)
- 12 61 280 Removing and installing/replacing oil pressure sensor (N55)
- 12 61 280 Removing and installing/replacing oil pressure switch (N57 D30 O/T 1)
- 12 61 285 Removing and installing/replacing oil-level sensor for engine oil (N63 B40/B44 O 1, S63 B44 T 2)
- Engine Compartment Fuse Box
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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