Bought car on April 13, and this navigation problem has come up 6 times while driving down the road. No obstructions from buildings, power lines, or anything else. Sometimes you can get it to reset by turning the car off and on quickly. Twice we had to let the car set for over an hour before it would reset. Other problems include right blind side detector going off with nothing there. Radio acquiring signal displays on the screen occasionally, and then resets itself.