I just picked up an '05 a couple weeks ago and was totally ready for rattles and whatnot having already driven a few Elises, but the passenger door seemed to really make a lot of noise over hard bumps. I initially mentally wrote it off as part of the cars "character" but it was quite loud. It sounded like the window was loose which didn't sound like a terribly fun project to try to investigate. I just went to tinker and discovered that the metal cylindrical knob that is bolted to the car that the door latches on to was completely loose and could jiggle around freely causing the door to not close tightly. A few turns on that puppy and now no more crashing noise over potholes. Hopefully this will help someone else!