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      01-24-2014, 10:04 AM   #7
elerner61
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Drives: '07 Z4M Roadster
Join Date: May 2011
Location: Mount Kisco, NY

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As many people agree, 4 (years) and out for me has been my rule after 30 years experience. This is for living in the NorthEast (ymmv). Particularly with this car and its electrical gremlins, I'll be changing mine out at the 4 year mark.

That said...when I bought the car (pre-owned in May of '11) a new Interstate battery was put in during the pre-sale inspection. I'm not sure if it's an AGM battery. Have those with extended AGM battery experience in the NorthEast seen battery lives beyond 4 years?
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