Hey folks, quick question regarding batteries for my 2005 E53 3.0i. RealOEM shows part numbers for both 80ah and 90ah versions. How do I know which spec is correct for my X? I don't know what was installed in it originally from the factory unfortunately. Thanks! I'm reading it is not good to use a lower ah than what was recommended and used by the factory. There is an AutoCraft in it now that lasted 6 years but I can't find an ah spec for it. Only the CCA, which is 800. Thanks in advance-
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'05 X5 3.0
'06 325i
'90 E30/S52
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