We came home from vacation to find a puddle in the driver’s side floorboard of our RX300. So, I did a little searching on the Internet to see if I could find a solution. Believe it or not, it sounds like a common problem.
Apparently, the sun roof has like a drain pan to catch leaks. The pan has two drains to let the water drain out without causing a problem. Well, one of our drains was clogged with dirt, and that was causing it to leak out inside the car rather that through those drains.
To fix the problem, I opened the sun roof and located the drains. I will post pictures below, but it was pretty obvious. Ours had dirt/mud blocking the opening so I knew that was the problem. I used a paper towel to try to wipe up as much of the dirt and stuff around the area, but then I used a toothpick to clean the mud away from the opening. Finally, I slowly dumped a cup of water into the pan to make sure the water flowed out the drain. I did it on each side and found a puddle of water by each of the front tires.
I read about people using compressors to blow the blockage out of the drains. I didn’t need to go that far.
Here are the posts that helped me solve the problem:
- Lexus Owner’s Club UK: Water Leak ?!
- Lexus Owner’s Club: Rx300 Moonroof Leak (front passenger carpet wet)
- Lexux Owner’s Club: 2000 Rx 300 Water On Floor Problem
Here are the pictures of the drain:
Here is a closer picture so you can see it:
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