Engine Cranks but Won't Start - Clicking Sound
The engine is cranking (clicking sound) but fails to start consistently. This indicates a likely fuel, ignition, or security system issue rather than a dead battery or starter motor failure.
Diagnosis Details
Possible Causes
Low fuel pressure or failed fuel pump
Faulty crankshaft position sensor
Immobilizer or key recognition fault
Clogged fuel filter or injector issue
Related OBD-II Codes
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What You Should Do
Check fuel pressure at the rail, scan for DTCs with a BMW-compatible scanner, verify the key fob battery and immobilizer status, and inspect the crankshaft position sensor wiring.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.