Has anybody had this problem? I don't know if I hit some combination of buttons by accident, but it's happened a few times recently. Suddenly the stock radio will loose all the presets. I'm getting tired of re-programming them.
This used to happen to a Sony pull-out HU that I had in my old car occasionally when I removed it for too long in cold weather - I think the backup battery would loose charge.
My radio lost presets today on a 50 degree day and there was no problem starting the car, so it shouldn't be a problem with the car battery.