Maybe I got lucky, but I tend to take very good care of my cars and never had any issue, besides regular maintenance which, can be expensive. Learn more about BMW X5 at the Edmunds.com Car Forums! October 2006 in BMW. I own a BMW X5. Are there any problems/concerns with respect to this year at this mileage? chaseboy Posts: 30. Get reliability information for the 2005 BMW X5 from Consumer Reports, which combines extensive survey data and expert technical knowledge. ... 2005 X5 at my local dealer with about 61,000 miles-which seem to be awfully high for a 2 year old vehicle. ... BMW X5 Reliability Concerns.