I have a 1998 GS300. I've been having moisture (ok, its really wet) under the driver's side floor mat. Soaked carpet. I'm wondering if its condensation from the A/C(?). I also thought that perhaps there was something leaking down the firewall under the mat - but that doesn't seem to be the case. The only moisture I can find is in a circle (about a foot across) in the carpet under the center of the floor mat. Its done this off and on during the summer, which led me to the A/C theory - though I really don't know what I am talking about.
Can someone help??? Thanks a bunch!!