Well you should just start writing up your for sale ad if you are stressing over maintenance repairs except for the alternator that you don't even have to pay for.

You crash into someone and have to fix your X and BMW should be listening to what?

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2002 X5 4.6 Sold
Dinan CAI, TB, Mass Air, Stage 4 engine & tranny software, X-pipe
2004 745Li
1997 Ford Mustang Cobra Vert
1985 Mazda RX-7
13B-REW single turbo 60-1, Haltech, Meth injection, MSD Ignition, and much more
2008 Mazda Speed3 Hypertech Tune