Welcome! Enjoy your cx-5.
No, I don't have any rattles at all at this point.
You may just need to tighten the spare tire.
I checked and the spare tire seems to be tighten enough. Anyways, I dropped the car off the dealer this morning, and hope it will be fixed. Was disappointed by the rattling noise considering first buy Mazda buyer.
Problem fixed from dealer. It was from a loose clip near the backseat/panel.