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.
2012 BMW X1FACTORY 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... Notes for disconnecting and connecting battery
- 61 20... Battery replacement information
- 12 00... Notes/information on start assistance (jump starting)
- 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
- 12 00... Instructions for working on the ignition system
- (61 13... Notes for opening contacts and locks of different plug contact systems)
- Notes
- 61 13... Butt connector for repairing a plug connection
- 61 13... Circular connector, 13- pin, system D2.5
- 61 13... Circular connector, 20- pin, system D2.5
- 61 13... Circular connector, 7- pin, 8-pin, system D2.5
- 61 13... Circular plugs, 4-, 7-, 10- 12-, 25-pin, System D1.5/D2.5
- 61 13... Connector housing, LCC contact (load current contact)
- 61 13... Control unit plugs, 25-, 35-, 55-, 83-, 88-pin
- 61 13... In-line connectors, 24-/44-pin, Hybrid System MQS/MPQ
- 61 13... In-line connectors, 30- pin, Hybrid System MQS/MPQ
- 61 13... In-line connectors, 30- pin, System D2.5
- 61 13... In-line plugs, 2- pin, System JPT ELA
- 61 13... In-line plugs, 2- pin, System MDK 3 plus 2.8
- 61 13... In-line plugs, 20-pin, System D2.5
- 61 13... In-line plugs, 4- pin, System DFK ELA
- 61 13... In-line plugs, 6- to 50-pin, System Elo
- 61 13... Inline connectors, 15- pin, System D2.5
- 61 13... Inline connectors, 6-, 8-pin, System MQS
- 61 13... Inline plugs, 2- pin, System MPQ 2.8
- 61 13... Inline plugs, 3-, 6-pin, System Elo-Power 2.8
- 61 13... Inline plugs, 4-, 10-pin, System Elo
- 61 13... Inline plugs, 8-, 12-pin, System D2.5
- 61 13... Socket housing (radio connector), Hybrid System MQS/MPQ
- 61 13... Socket housing 42-, 43-, 46-pin, Hybrid System MQS/MPQ
- 61 13... Socket housings, 2x21-, 2x27-pin, Hybrid Systems MQS/MPQ, Elo/Elo Power
- 61 13... Socket housings, 5- pin, 8-pin, System MQS/MPQ
- 61 00... Notes on handling wiring harnesses and cables
- Ignition Wires, Spark Plugs
- Ignition Coil
- Electronic Switching Or Control Units
- 12 14 700 Encoding the control unit (DME/DDE)
- 12 14 602 Removing/replacing knock sensor (1st and 2nd cylinder) (N20)
- 12 14 600 Removing/replacing knock sensor (3rd and 4th cylinders) (N20)
- 12 14 600 Removing/replacing knock sensors (N55)
- 12 14 524 Replace pulse sensor on exhaust camshaft (N54, N54T, N55)
- 12 14 651 Replace the pressure sensor on the charge air duct (N54, N54T, N55)
- 12 14 550 Replacing control unit (DME) (N20)
- 12 14 550 Replacing control unit (DME) (N55)
- 12 14 521 Replacing crankshaft pulse sensor (N20)
- 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)
- 12 14 523 Replacing pulse sensor on intake camshaft (N20)
- 12 14 650 Replacing suction pressure sensor on intake plenum (N20)
- 12 14 650 Replacing suction pressure sensor on pressure pipe (N20)
- Alternator
- Starter
- Starter And Alternator Cables
- Engine Wiring Harness
- 12 51 235 Removing and installing/replacing wiring harness for engine sensor system module 1 (N20)
- 12 51 240 Removing and installing/replacing engine sensor system module 2 wiring harness (N20)
- 12 51 245 Replacing the wiring harness section for the engine transmission module (N20)
- 12 51 215 Replacing wiring harness section for Valvetronic servomotor (N20)
- 12 51 001 Replacing wiring harness section for engine (N55)
- 12 51 210 Replacing wiring harness section for ignition and injectors (N20)
- 12 51 100 Replacing wiring harness section for ignition and injectors (N55)
- Oil Pressure Sensor, Oil Temperature Sensor, Oil Level Sensor
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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