Other than regular maintenance the only repair was a blown transfer case seal at about 120,000 miles.
I am very interested in a 5 series next time. Because I live in Upstate NY I will definitely get the X-drive.
If the X3 continues to perform well I am considering handing it down to my 17 year old. My only concern with this is that when a repair is needed we all know how much it can cost.