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      06-17-2025, 11:19 AM   #37
KurtsM5
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Drives: 2013 w/ DPs, BM3 stage 2
Join Date: Sep 2022
Location: Tampa Bay area Florida

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2013 F10 M5  [8.80]
Quote:
Originally Posted by 325_bucks View Post
Update on this, I took the plunge given the old battery was original and I hear these cars can eat batteries.

So new battery installed. Interesting, first start after new battery, the idle was different to how it was before, after the first 30 seconds, it wasn’t 100% not moving at all, there was certainly a little fluctuation but nothing like it was before. I wonder if it could be as simple as this or whether this was a false result. If it is battery related then there could be a battery drain somewhere.

Battery voltage before starting (new battery) was 12.2v and after a short drive was also 12.2v

I need to see how it is tomorrow. That’s the real test I guess.
You did get an AGM battery, right?
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