VC & VCG are something I always have done as soon as I purchase the vehicle so both vehicles are on low mileage VCs. Having said that if replacement were required I would consider one of these Amazon units if the prove reliable.
Keep us posted on the outcome.

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