Recently I bought a 2012 Jaguar XJ and it is missing this little piece in the front that I would like to replace. Does anyone know what it’s called? I’ve tried searching to no avail. The picture below is not mine but shows the where the piece I’m needing should be. Any help is greatly appreciated!

 

that is the headlamp washer cover. You can probably find the appropriate name the parts catalogue in the stickies at the top ths thread.

 

Lamp Washer Cover
C2D3560 (right side) C2D3561 (left side)
That's assuming you're just missing the cover, not the whole washer assembly.
C2d3560 for sale | eBay