spta97

I had some condensation in the driver's headlamp on my GFs RX300. It was actually quite a bit of water (about 6 ounces!). Anyway, I removed the lamp (discovered you do not need to remove the bumper via search), drained it, and cooked it in the oven to take it apart. After I cleaned it out I recooked it, sealed it, then put silicone around it (and all the rubber bulb housings) for good meausre.

Anyway, as I was fussing with it I noticed it had a rubber "drain" that was over a vent hole on the top of the lamp. I noticed that there was a piece of tape covering the hole.

My thought is this, the rampant issue with condensation might be caused by this plugged vent hole. Why would Lexus put a hole on the lamp housing, cover it with a rubber drain (that points down so mosture can get out but not in) then cover it with a piece of tape? I have a feeling that this piece was meant to be removed and the fact that it wasn't could be the cause of many people's condensation (although my problem was obviously a bad seal but a vent could have prevented the accumulation by the lamps heating the water perhaps).

So I washed the truck and the newly repaired headlight was clear, the passenger lamp started to fog up! It went away after a bit but I took the piece of tape off of the vent so I hope to have no more issues.

Anyone have any thoughts on this?

bloo1987

So about my problem with foggy headlamps. Is there anyway to get rid of this?! It is really bothering me. Cause I got the aftermarket headlamps with angel eyes in them. And with the fog in one side you cant really see the angel eyes Is there any possible way to deal with this without buying a new headlamp!? Please help. Thanks.

Lil4X

Some time ago I heard of an RX owner removing his headlight assemblies and putting them in his wife's oven set as low as possible - watching them carefully to see the moisture dry up. At that point he ran a thin bead of silicon caulk around the joints in the housing, and even sealed the lamp bases with it as well. He claimed it worked, but I'm not sure I'd want to do it. YMMV.

The recommended dealer fix is replacement of the entire unit - but if you've looked at the cost of that, you might require CPR. What we are looking for is a few DIY suggestions.

I merged your post bloo, with another similar one from spta a while back. Maybe with a little more exposure, we can all get a better answer.

bloo1987

oh ok...Haha. I was like where did my post go?! I swear I put it under my post. But yeah. Does putting the headlamp in the over actually work?

bloo1987

oops haha. I meant oven.

Lil4X

Frankly, I have no idea. My RX 300 didn't exhibit this problem until the week I turned it in, and my 330 went over three years before BOTH lights fogged over and were replaced under warranty. As yet, no further leaks.

You might try an advanced search of the 300 sub-forum that goes back as far as possible. Several years ago a number of people were experiencing condensation and a lot of fixes were discussed. Some of them seemed to be successful.

bloo1987

anybody else have an idea on this?

NateJG

maxSteel

Wow, I learned a lot. That should be added to the Sticky's.
Wouldn't want to accidentally use the wrong fluid.