BMW Questions? Ask a BMW Repair Expert for Answers.
what is voltage with the engine running?
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that is too low, should be 14-14.5
along with the BSD faults, this strongly points to a failing alternator so I would suggest replacing yours.Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.
I would strongly advise a proper BMW alternator despite the cost. many aftermarket ones a) fail prematurely b) do not properly communicate with the engine computer setting bsd faults. not really any connections to check other than the obvious ones at the alternator. Please not forget to CLICK ON a positive rating. If you wish to follow up at a future date you can do so for no additional charge after leaving a positive rating.
I would still replace the alternator as this is the place to start in the presence of bsd faults. Please not forget to CLICK ON a positive rating