The clock only resets the hours and ALWAYS the same amount of time. It can't be a voltage dip since the time is dead on when I restart the car, it takes a few miles before it changes so voltage is fairly constant. I am going to look through the BMW TSB's to see if there is anything up. As I said before it did not do this prior to the software upgrade though it could be completely coincidental, thanks for your time and efforts, this is an odd one for sure.