2002 e53 3.0
happend in 2002 so I dont recall all the details but I would say it had <5k miles on it.
It developed a loud rattling noise and was repaired under warrenty. The charge was around $6k but cost me nothing.

The transfer case was "back ordered" and the first one sent was bad... the dealer had to wait for a 2nd one. I remember needing an suv for one of the weekends and the dealer wouldnt pay for an upgrade on my rental but offered to let me drive my broken x5 around. terrible experience overall. I was very hesitant about getting an e70 but wifey insisted.