One problem related to loud engine noise has been reported for the 2008 BMW X5. The most recently reported issues are listed below.
Tl- the contact owns a 2008 BMW X5. The contact stated that while driving approximately 35 mph the vehicle suddenly stalled without warning. After restarting the vehicle a rumbling noise was heard coming from the engine. The caused of the failure was not diagnosed or repaired. The manufacturer was not notified. The failure mileage was 47,000. Jft.