So I just seemingly just fixed my passenger door rattle. I found 3 10mm bolts just chilling at the bottom of the door near the weep holes. They didn't look used. Removed the speaker to get better look. Two were visible. Last one I used my inspection camera to find. Then sent it back in on a rescue mission with a magnet. It fixed door vibration problem for sure but not sure if that cured another mystery rattle I cant pin down its location. BTW Skrillex "rock n roll" worked quite well to duplicate the door issue.
I kinda want to mail the 3 bolts to the factory in Japan with a "someone might be looking for these" note. 2011 370z sport touring 40k