I have wasted so much time troubleshooting a noise coming from front passenger door. spent multiple weeks ripping out the seat, corner dash, door panels, headliner trim, and inserts. In the process I have learned a lot about the door assembly . Problem found; it was the coins inside the organizer i had placed inside armrest. I found the source when I road as a passenger when the noise transferred to driver side front door. amazing how the noise can travel. word of advice, if you hear noise/rattling, remove everything that didn't come with the car when you purchased new I was blaming the build quality but my ear was playing tricks.