Had the dealer replace the battery with the new AGM type. The color of the battery has nothing to do with the type. The new AGM from the dealer is also black. I had a coupon for 10% off service at the dealer so it ended up costing me about $435.00. But hey, they washed my car!

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2007 X5 4.8i Space Gray
2001 X5 3.0 Titanium Silver