This is an intermittent problem but it happens all too often. The doors just lock and unlock on their own. It started when I was washing the car, the doors would just be clicking open and close like crazy, especially when I was near one of the doors. The fob was in my pocket. We have the smart key system, which I love, but this could be a serious problem. I just changed the battery in the fob because last week, when it was really hot, neither the doors would open without the emergency key, nor would the system power up without the fob inserted in the dash. Just 10 minutes ago, with the fob sitting on the counter, I heard the familiar chirp of the doors locking, totally without anyone or anything touching a fob. I have had it into two dealers and neither one can duplicate the problem. They won't fix it if they can't duplicate it. Any suggestions?