I had the same problem a few months ago with both of my key fobs at the same time. If your doors are not shut tightly the key fob wont work. It also seems that if you press the key too many times in succession they quit working altogether. I had to have mine both reprogrammed at the dealer. They couldn't fix it the first time and I had to return after they received more info from headquarters. I lost the use of my van for a day due to a key problem. Sometimes technology just makes everything more complicated.I noticed today that pressing the lock button did not lock the rear doors. In trying to figure it out I press the buttons to unlock & lock several times and finally it quit working. Any ideas why?