Latest results are here:

TrueDelta Vehicle Reliability Survey results

The next set will be posted in August.

I still have not started collecting data on any year of the X5 because too few owners have signed up to participate. I am collecting data on most competitors, including the Acura MDX, Audi Q7, and Mercedes GL. The Acura and Audi will be included in the August results.

For the details, and to sign up:

Vehicle reliability research