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Old 02-13-2013, 02:49 PM   #2
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Join Date: Jan 2013
Location: Calgary
Posts: 86
My Ride: 2003 M3 Convertible
Originally Posted by M3B4U View Post
Don't know why my battery on bmw e46 m3 keeps dying on me when I don't drive my car for 2 day. Can somebody can help me
Have your alternator checked. It's relatively cheap to do. Also, if it's an old battery, over 5 years, they can often times die, even if you haven't had any previous issues over the 5 years. My battery has been fine since 2005, so obviously it's not all batteries...

Also if you have drained that battery more than twice, typically batteries don't hold a charge worth crap after.

hope that helps!
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