Must of the cars have a little door noise on big bumps but it can cut down considerably with a few things. First, add 1/2 in "D", stick on weatherstrip the the doors so there is a cushion. Second, Just the latches to catch tight and not allow the doors to wiggle when they are closed. this takes a little time and fiddling with to get right. Third, be sure to check the hinges. On my MK II, the right door bushing got loose and the pin could wiggle witch allowed the door to move, too. I replaced the hinges with the new style, AFTERMARKET hinges that are no longer available. The instructions say newer FFR hinges require welding. I managed to redrill the posts with no welding. I don't know if you can do the same with the FFR hinges.