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      02-06-2013, 09:58 PM   #6
fun2drive
BMWCCA 149159
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Drives: E93 335 Vert E36 M3/4
Join Date: Jul 2006
Location: Florida Panhandle

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BMW uses two battery suppliers
Bosch who makes batteries under the Excide name
Douglas is the other battery supplier
I think as long as you stay within the AH requirements give or take a few amp-hours you will be fine. You can register your battery with a K+CAN OBDII cable and the software our generous poster provided in the coding section of this forum
http://www.e90post.com/forums/showth...ghlight=coding
After this you should be all set. If you get a huge difference in AH rating you need coding but stay with in reason say less than 10% my guess is you will be fine...