No reason you can't run it to 200,000 if you maintain it properly. The engine should be fine. The transmission won't necessarily wear out, but it will be more likely to have a problem that requires repair, simply because of the longer life. Repairing a transmission is still cheaper than buying a new vehicle, if you like the car and it still meets your needs.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue