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      02-17-2020, 03:06 PM   #17
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Drives: 2017 440i Gran Coupe & 2015 X5
Join Date: Nov 2012
Location: Orange County, CA

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Quote:
Originally Posted by dmaxdmax View Post
My buddy who owns an auto shop said that bmw advises to replace the battery every three years. Mine, at 80k miles is gone. I'm getting 12V after a nice highway drive on it and the alt is putting out 14.5 as it should.

Sucky batteries. Hope that's all you need!
You might be right. My battery is 3.5 years old.