trevor9098

I decided to look into the headlight bulb changing process. In examining the headlights, I noticed that they are only sealed on the top 2/3 of the light module to the car's body. The bottom does not have any gasket at all, and water and other contaminants are free to enter the cavity under and around the headlight. Now, the headlight module is sealed in itself, but this seemed like an odd design choice.

Does anyone have any idea why this was done?

Edgy01

The Bi-Xenon section is fully sealed. It's ultimately best not to attempt to seal up areas that are not affected by moisture because it would require a lot of moisture sealing and maintenance. Only seal up what is critical. The other areas are just not that critical. Anyone who has taken out their headlight assembles can see that.

trevor9098

Interesting. I just haven't seen a car where the bi-xenon section is not sealed to the body of the car. Funny they just did the top portion.

Edgy01

My guess would be that there is so much heat generated inside those housings that there must be allowances for thermal expansion and venting.

trevor9098

That makes sense. The lights definitely generate huge amounts of heat! I'll have to take one out, and see what is underneath, and where water would go.

btw- beautiful color on your pcar. love it.

911Steve

+1 on the heat this generates, I would also believe due to the heat especially in cold weather the lens would fog up. Needs to have a vented opening.

Bijan

Bi Xenons are also high voltage, can't imagine what moisture would do
My rear lights fog up after a few days of rain when I start the car, although car is garaged, it dissapears after some time of driving.