I just had to change my battery today. I replaced the OEM battery in my 02 x5 in sep of 2007 with an Interstate MTP-93. After 25 months it developed an internal short, I probably could have desulfated it but no need it had a 30 month replacement and then a prorate warranty. If I had it to do over again I'd probably check to see if I could have gotten an Optima to fit in the battery box or go OEM like.