2011 N55 at 95k.
CPO warranty ended at the start of the month.
Got a new rear diff due to it leaking and a new valve cover at my last warranty checkup.
Just did wallnut blasting and it was nowhere near as bad as a N54 with half the mileage.
I'd advise anyone thinking about it to save their money.
About to do a full control arm and tie rod and sway bar bushing refresh due to a wierd knocking sound from my front suspension.
Interestingly enough the front sway bar bushing is not available on its own. So I had to go upgraded power flex version.