I can honestly say I would not buy another X5. I have had so many problems with my 2011. Even though it is a CPO certified BMW up to 7 yrs 100k miles, I'm dropping it off again, every other month for something, the proof is in the pudding. My service writer printed all my repairs and it was a book! Every service performed, following the factory maintenance schedule was from the dealership, except for the last set of tires, as they would not install non run flats. Fun to drive is awesome but reliability is horrible. I have the N55 motor, just hit 70k miles. It was in the shop almost 45 days last year. One thing I can say is that I got a chance to drive several different BMW models as loaners.