To answer the question for the N62, you don't need to remove anything other than the plastic under panel up front. Then you just compress the tensioner, remove belt. Easy peasy.

I've found the belts crack a lot sooner than one would like, at least in Vegas they do.

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Kirk
Las Vegas
2016 X5 40e Mineral White/Black Dakota Leather, ZLL, ZCW, ZDA, ZDB, ZPP, multi contour seats, rear side window shades, HK stereo
2011 E90M3, 6-speed manual