What is this?

[Oldrocky]

Hi,
I had my 2018 Model X 6 seater detailed. When I got it back there was a plastic part sitting on the
floor in the passenger side. I have zero idea what it is or where it should be put back. Any one
have an idea? Picture attached. thanks! - Jim in the PNW

 

[Nosken]

That looks like the end cap for the fore aft, seat slider rail from either front seat.
The center "Prong" should have a clip that keeps it in place---I think

 

[Oldrocky]

OK, I will look under the passenger seat and see if I can figure out where it goes.
I think it is a 'cover' so stuff stored under the seat won't interfere with the seat
adjustment mechanism.
- thanks ... Jim in the PNW

 

[Nosken]

If it is the part I think it is, it is just a cover for the end of the seat track, so the sharp end of the track is not exposed.

Removing the Passenger Seat Track Cover

 

[Oldrocky]

Thanks - it was the seat rail 'cover' ... slipped right back in to place with
no hassles ... once I ran the seat all the way back. It probably got knocked
off by the guy vacuuming the carpet when I had the car detailed.
- Jim in PNW