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      04-23-2026, 03:08 PM   #20
BobsM3Coupe
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Drives: X5MC
Join Date: Nov 2009
Location: California

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Quote:
Originally Posted by jkoral View Post
Perhaps, but in my experience I'm getting 10+ years on BMW batteries.

Last BMW, 10 years before car was totaled. Battery was still healthy.
Current BMW, 9 years and counting on original battery.

This is in New England climate, car sits in unheated garage.

My kids cars (3 Mazdas) seem to require one every 5 years or so.

Do you occasionally use a smart battery charger?
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