Considering 2013 X5M with 100k mi and looking for your thoughts?

[Dave00]

Originally Posted by andrewwynn

Unless my second car with a solid budget I'd shy away from S motors. We bought n63 motor powered 12 and in my opinion the detuned model should have just enough less stress on the parts for longer life span.

Obviously the substantially higher HP and torque will put more stress on the transmission as well so odds are prob more likely to break something in the drive train. But it will be a damn lot of fun until it does.

I want a 50i model after the Tu3 n63. Similar power to the M you are considering but again detuned from the S motor.

Interesting, I'd never recommend the N63 over the S63 given all of the valve seal issues. For some reason the S63's don't seem to suffer the same fate, but that N63 will begin to drink oil with those valve seal issues.