Unfortunately I got into a minor accident and had to replace my front bumper. One of the headlights got pretty scratched up so i had to get it buffed out. But after getting my car back, I realized that some moisture was trapped inside the other headlight assembly. What do you think I should do? Would the dealer replace it w/o charge? Thanks for your input...

 

The seal is shot , the dealer should warnentee it. They did one for me. if not use the search function and you will find many threads on how to " clear" and reseal.

 

Why should the dealer warranty an item that was (likely) damaged in a collision?

 

, but insurance should have covered it. If you did not go through insurance, then do as trich said. If they are taking your bumper off to paint it that would be the best time to take out your light.