general problems of the 2008 BMW X3

While driving at about 25 mph on residential street, felt an unusual "bump", continued driving home with no apparent problem. Started car next morning and felt an unusual vibration and noise which dissapeared when driving. Vibration at idle continued, two days later, after driving on freeway, I found a broken bolt under the car in garage, I immediately took car to dealer service department. Was told that several motor mount bolts had sheared and was lucky no serious damage occurred. Quick internet search indicated sheared motor mount bolts to be a problem with BMW X3 years 2007 & 2008. Broken motor mount bolts could result in serious accident and/or injury - again, I was lucky.