My '01 is on the second replacement. Orginal OEM must have failed before I purchased as they had replaced it with a cheap non-OEM battery of the wrong size. Another thing CPO failed to discover. This failed 2 weeks after purchase and I had an aftermarket Exide fitted which came with vent etc. as required. It also has a 92 month pro-rated warranty.

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2021 X5 xDrive40i
2015 X5 xDrive35i MSport
(Traded) 2013 X5 xDrive35i