My rear driver's side door definitely has a different sound when closing. I guess you could call it a rattle. To me it has a hollow metal sound to it, and even that isn't a real accurate description. It's almost like there's a piece of metal that it thin and large sized that should be supported in the middle but isn't. So when you close the door the center of the piece vibrates for a second. It's not anything I'm going to run to the dealer for, but I'll say something at my next oil change if I think about it to see if they'll check it out.