We have a 2005 Sienna XLE Limited with 70,000+ miles and have had very few problems so far. This week, my wife noticed the radio started changing channels by itself. Seemingly at random, the radio changes either one channel up or down or changes between FM1 and FM2. I drove a little this weekend, and I watched it happen myself. It happens whether we are moving or sitting still. I suspect something in the control head since the only things that can get the radio to change one channel up or down is the tuning dial in the upper right of the control head and the FM button is just below this dial. It may be no coincidence that this week has been the coldest of the season here in Indiana.
Has anyone else experienced anything like this?