Just check my right rear passenger door today and boy were those bolts loose or what. I did my front doors earlier this year and there always seems to be 3 or 4 bolts that are lose. It's usually the ones that hold the door panels, speakers, door handles, and window motors. I was just tired of hearing them jingling around every time I would close the doors, when the bass is up on the speakers, or on every bump on the road. So check those doors you guys.