Back in August 2010 when my dealer received their very first X5M, I went and test drove it and it had NO power at all. I drove it for quite a while since I was the only one at that dealership to have placed an order and deposit for one. I told my salesman that it was severely lacking in power. It wasn't random, it was always like that. After a month or so of being in the shop, they found that it was a vacuum hose or something too.
He assured me, the car I ordered wouldn't have that problem. lol.

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2022 X5M Comp Dravit Grey/Full Silverstone
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2018 M5 Black/Full Silverstone
2015 X5M Donington Grey/Full Silverstone
2010 X5M Space Grey/Full Silverstone
2003 4.6is Silver/Black