My car will randomly lock itself. Sometimes, if I leave the fob in the car to go in store or check mail, or when I am at work, when I try to get in my car it's locked.

I have actually seen the locks engage by itself with my own eyes. When I used the fob to unlock, the car will then lock itself on it's own.

It is very weird and inconvenient. I try to be careful, but I still have to call Triple AAA several times a year.