I recently installed HID's and LED's, replacing all the lights on my 08 G37S Coupe. I had no problems over the summer months, but now that it's early November in Niagara Falls, Canada the temperature has lowered and I've noticed condensation inside the headlight lens of the drivers side light (but not the passenger side). The only thing I can think of causing this would be cool air getting inside the lens and then the sun, and heat from HID's causes condensation. This would happen when I had to drill a larger hole in the one plastic closer piece to get the wires from the HID ballast through. Originally the two wires had a rubber sealer around them to seal the plastic twist closer. Does this make sense to anyone??? would cool air getting into the lens cause the condensation??? If so, would some silicone caulking around the wires going through the twist closer solve the problem?? Hopefully you guys understand what I'm asking, if not I'll have to look for pictures to help with my question.

 

If you violated the seal into your headlight assembly, then yes, moisture laden air would cause condensation. You might try heating the lights in an oven to drive off the moisture then seal it up with caulk.

 

Great!!! thanks GoFightNguyen..... When I changed lights and followed directions from internet they did not mention re-sealing the headlight assembly.... If they are down south USA they wouldn't have probe with cold air..... But I'm glad you confirmed what I was thinking all along.... now to take the car apart to fix the issue!! We all know how easy it is to access the headlights on these vehicles!! Thanks again

 

Please do not use caulk……………….
OCI BUTYL Rubber Glue. That is the one you use.

 

Thank you kindly for correcting that information for me..... Do you know where I would get the OCI BUTYL Rubber Glue from?

Nick