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      03-17-2024, 11:01 PM   #39
GSB
Electronics Engineer
United_States
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Drives: 2008 335i E92 Coupe (N54 6MT)
Join Date: Dec 2012
Location: Vancouver, WA

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Quote:
Originally Posted by PhaseP View Post
I would say the starter is likely the issue,
Likely in this case.
Quote:
Originally Posted by PhaseP View Post
...but seeing battery voltage warning on the dash is from my experience about the alternator not charging the battery.
Not likely in this case. The posted monitoring graphs show proper charging voltage.

I had an 11-year-old battery in my 335i operating at only 10.5V after a full charge with full cranking capacity. Nothing wrong with the alternator, just one bad cell. Charging on a fancy charger made no difference.
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