One is broken and the headlight has a bunch of condensation that comes and goes when the weather changes. I don't know what the piece of called, its the round cover that seals the back of the headlight. Does anyone have a part number? Thanks

 

Just called a housing cap, and do you have a coupe or sedan, and what year. Worst case theretrofitsource will have something for you.

 

Thanks. 05 coupe

 

I don't have extras for that one sorry, check housing cap g35 on eBay or join HIDplanet and post a thread there.