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.
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HOMESERVICE MANUALSBMW2009550I STANDARD, GS653BZREPAIR AND DIAGNOSISENGINE PERFORMANCEIGNITION SYSTEMENGINE ELECTRICAL SYSTEM - REPAIR
2009 BMW 550i Standard, GS653BZ
Engine Electrical System - Repair
2009 BMW 550i Standard, GS653BZSECTION Engine Electrical System - Repair
- Troubleshooting
- 12 00... Instructions for disconnecting and connecting battery
- 12 00... Instructions for working on the ignition system
- 12 00... Notes/information on removing and installing control units
- 12 00... Notes/information on start assistance (jump starting)
- 61 00... Notes on handling wiring harnesses and cables
- Ignition Wires, Spark Plugs
- Ignition Coil
- 12 13... Additional fault notes for troubleshooting
- 12 13... Checking secondary signal for stationary ignition distribution
- 12 13... Further fault patterns with evaluation
- 12 13 009 Checking rod-type ignition coils (M54, M56, N40, N42, N43, N45, N46, N52, N62, N62TU, N73)
- 12 13 511 Replacing ignition coil (N62TU)
- Electronic Switching Or Control Unit
- 11 37 700 Replacing control unit (Valvetronic)
- 12 14 512 Replacing pulse generator on left exhaust camshaft (N62, N62TU)
- 12 14 513 Replacing pulse generator on right exhaust camshaft (N62, N62TU)
- 12 14 521 Replacing crankshaft pulse generator (N62, N62TU)
- 12 14 522 Replacing pulse generator on left inlet camshaft (N62, N62TU)
- 12 14 526 Replacing pulse generator on right inlet camshaft (N62, N62TU)
- 12 14 550 Replacing control unit (DME)
- 12 14 550 Replacing control unit (DME) (N62, N62TU)
- 12 14 610 Replacing right knock sensors (N62, N62TU)
- 12 14 611 Replacing left knock sensors (N62, N62TU)
- 12 14 700 Coding control module (DME / DDE)
- 12 14 705 Programming control unit (DME / DDE)
- 12 90... Removing and installing/replacing electronics box
- 12 90 100 Replacing fan for electronics box (N62)
- Alternator With Drive And Mounting
- Regulator
- Starter With Mounting
- Starter Lead
- Engine Wiring Loom
- Oil Pressure Oil Temperature
- Control Unit Box
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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.