Given the sensitivity of charging an AGM battery the wrong amount, and that the BMW is intelligent enough to charge a battery differently based on the amp-hours of the battery, why not take advantage of this feature? Assuming one has the proper equipment, coding a battery takes less than a minute.

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2014 BMW 328i Xdrive
2011 BMW 335i M-Sport
2008 BMW X5 4.8i Sport
2000 BMW 528i 5sp