Hi, I was replacing the driver side headlamp in my 2006 LR3 when this part fell out. Does anyone know where it goes? Thank you. Scott

 

Ac line cap maybe

 

Yup, cap for the high pressure AC line

 

You all are the best. That is exactly what it is. I followed the A/C lines and found a cap just like it. So, either there is a second one somewhere or someone dropped that one while servicing my car and just replaced it with a new one.
I am new to this forum and very impressed with all the knowledge here.
Thank you,
Scott