I am cleaning up a 2011 Jaguar XF that I recently acquired as a flood damaged vehicle. I pulled the drivers side headlight out to clean the underside of the headlight. When I got the headlight removed from the Jag, I noticed that there was an oval shaped piece of plastic with an electrical wire attached to it, just laying on top of the lower valance. See picture. It was even connected to anything. Would anyone know what this part was for, or even where it is/was supposed to go?

 

It's the antenna for the TPMS (Tire Pressure Monitoring System)

There's slots in the undertray that bolts to the front bumper that they clip into so they sit vertically in front of each wheel.

 

I found the slots. I guess there isn't anything that keeps them in place other than the slots themselves?

 

Nope, they just clip into them, rather poorly.