I have had my X since 2005 and it had 80,000 miles when I bought it. I am the second owner and so far I have had regular maintenance issues. Window regulators, alternator, brakes, tires, catalytic converter go out around 200-220,000, MAF sensor, oxygen sensors. It has been very reliable.

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2010 X5M /// R63 AMG...Wifey's 540HP Family Hualer

2001 X5 3.0i Sport 335,448 miles & counting...
SMG M3 Steering wheel
E46 Stainless Racing Headers
4.6is Exhaust
Turner Pulleys
Afe Intake
Brembo drilled rotors
PowerFlex Bushings
Hualingan
30mm H&R Spacers rear
20mm H&R Spacers front
Bavarian Autosport High-Performance Coils
Active Autowerke's Performance Software