water on floor behind driver seat...
 

2007 GS350

K, I blamed my kid for this but now I'm not sure. one day she had her water bottle laying on the floor. She picked it up. A few days later I noticed the whole floor behind my seat is soaking wet. Including the mat.
I soaked up everything. I'm pretty sure its dry. Patting with a paper towel was dry. We had heavy rain for three days. And behind the driver seat its all wet. Not the mat, but under it. carpet is wet. I dried it up as best as I could but a few days later it's wet again.

The water bottle holds almost a liter of water and I don't know how much spilled. So I can't figure out if its the bottle or not. Like maybe all the water i'm soaking is on the carpet and some of the padding then after a while, water for the surrounding padding is coming up to the surface.

I checked my a/c tube, its clear. I can see water dripping under my car.
I don't know where the tubes are for the sunroof. Are they behind the driver seat? Where does it drip outside?

Check your drain tubes
https://www.clublexus.com/forums/gs-3rd-gen-2006-2011/796700-lexus-gs-300-leaking-water-inside-car.html

Well I tried to pour water into my sunroof. It drains on both sides of my car. just behind the wheel well.
So I still don't know where the water is coming from. A/C drain is clear. And I put napkins in the vent bellow my seat and it was dry. But the carpet still gets damp just behind the driver seat (passenger foot well behind the driver's seat.)

Could it be that she spilled that much water? I swear I dry it up almost to the point where I don't feel anything wet. Just in a few days, its damp again. enough where the matt's underside rubber has moisture condensation.

Mine did the same thing and it was the evap drain grommet above the transmission. ****ty design as it only has a small slit in it to drain and it had a blockage so nothing was able to drain out. Not sure if you've checked this or not.

I read a few threads on it before I went to see if that was the issue and people were saying to remove the exhaust, DS and lower the tranny. I was able to get to it without removing anything by feeling around and using a small 90 degree pick tool to take it out. Worth a look if you haven't already.

this is also happening to me....I wish there wer some pics of the gromet that has to be removed so i can show it to my mechanic.

Here is the TSIB, it might help:

https://www.clublexus.com/forums/att...sb-0016-10.pdf

Like I said, it is totally doable without having to remove everything to get to it.

Here is a pic of the stupid thing:


https://cimg3.ibsrv.net/gimg/www.clu...48bb97827e.jpg