One problem related to other fuel type engine turbo-charger has been reported for the 2008 BMW X5. The most recently reported issues are listed below.
I was driving under heavy rain on April 20, 2012 in houston, TX. I first saw engine overheating warning sign on the dash and then misty smoke came out under the hood. I had to get off the highway and drove to a nearby repair shop. It was determined that the failure was due to a faulty water pump. I had a friend who has a 2008 BMW X5 and recently had the same issue. We believe that recall #11v521000 that concerns only 2010-2011 BMW X5 needs to be expanded to X5s of earlier years. Thank you for your consideration.