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      06-25-2015, 08:34 AM   #19
Sered
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Drives: 08 E90 335i
Join Date: Apr 2012
Location: Melbourne, FL

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Quote:
Originally Posted by SaNGRia View Post
The battery that i have right now is replaced by me and registered with Tool32 . I purchased an OEM Battery from S/Dealer and i did the replacement. This car never even driven in the rain. Always garage kept and i never seen water in the tray either. And this problem was in the car before the battery replacement. But if it was a water leaking it makes sense what you are saying. And sorry for the long writing
I think you misunderstand. Pull the tray the battery sits on. The wire for the starter/alternator runs under the tray and connects to a separate terminal. That terminal can easily become submerged even with just a small amount of water. If it happens enough times, it will degrade and cause the exact issues you're describing.

Mine was so bad I had to chop off the end and redo it with a battery extension cable and terminal. I've heard its semi-common as the water gets in behind the gas cap to body seals and drains down there.
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