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      02-15-2013, 05:11 PM   #2
mhughett
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Drives: 2007 Z4 M Coupe
Join Date: May 2009
Location: Tulsa, Ok

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Personally, I think you're overthinking this decision. I replaced the battery in my M coupe a few months ago with an AGM battery from O'Reilly. It was about $150 with a $25 rebate and had the EXACT same spec's as the battery I pulled out of my car. It was a 48ext AGM battery, 760cca, same size, color, markings, everything. It was identical in every way to the one that I was replacing. However, if you want to pay twice as much for the same battery at the BMW dealer and get a warranty that's not nearly as good, go for it.
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2013 Audi TT RS (Tech Pkg, Sport Exhaust, Heated Seats, Sirius)

Retired--2007 Z4 M Coupe (Imola Red/Black, Premium Pkg, Heated Seats, XM, Bimmian stubby antenna, CDV delete, Apex EC-7--Anthracite, Goodyear F1 Asymetric 2.

Last edited by mhughett; 02-15-2013 at 05:19 PM..
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