can water condensation leak into rear footwell under carpet

There are also hole plugs in the underbody but I wouldn't really suspect those. Possibly from a hole plug under the rocker? Has the car been involved in a side impact?

Thanks for sharing advice Mark. No the car has never been in an accident. I have blown compressed air down the sun roof channels thinking their might be debris obstructing water drainage. I will know in a few days if it solves the problem. Gerry

I have a 2006 GS 300 Lexus and while driving long distance with the airconditioner on, water begin to drip onto my feet, then a light come on and said check system light, what could be the problem.

Air cond. drain hose could be clogged.