Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
2007 BMW 525i 5 Series E60 MSV70 N52, fault codes_
9CB9 LM:BATTERY EXHAUSTED
9C55 IHKA FOGGING SENSOR
2E30,2E31,2E32,2E33,2E34,2E35
A8BB LM E60 RIGHT CLEARANCE LIGHT FAULTY
I must confess i am a recovering parts changer, I've replaced starter,alternator,ignition coils,spark plugs,fuel injectors,battery,IBS,all relays