Nav DVD Read Error
Started having the Nav system fail periodically in my 2008 E92. Took it to the dealer and he tells me there is a service bulletin out for the problem. DVD drive has to be replaced. Message on the screen says "DVD Read Error - Insert DVD".
While they were testing the DVD drive they (the dealer) also came across errors in the digital tuner for the HD radio. I hadn't noticed any issues with that; however, HD radio has not yet reach my part of the world. All warranty fixes.