Where does this part go? My wife found it in the footwell area.
I looked around but haven't figured it out yet...

 

looks like a interior light cover

 

Need more angles but it looks like the cover for the seat rail... check all for corners.

 

Seat rail cover is my first guess too, but I thought they were always black regardless of your interior color? Definitely fits the location it was found.

Definitely need more (and slightly less large?) pics to get a better idea of what it might be.

 

I figured it out. Thanks for your help.
It came from the passenger side seat rear rail cover area. Snaps in place.
The others were out too, but still in place.

 

I haven't noticed it in the Cayenne, but the ones in the 996 are bad about randomly popping loose.