I own a 2022 CX-5. The floorboard/carpet underneath the front passenger seat is completely saturated with water and soaked.

I noticed a little spot of white mildew/mold when I grabbed something out of my car (gross). So I went to clean it and I noticed the carpet was REALLY moist. Particularly right under the front passenger seat. So I looked further and found that right underneath some vent opening the carpet was soaking wet. I put so many paper towels down through that opening in the carpet and it just kept sucking up water. I keep pressing on the carpet and water still bubbles out; it’s so moist still. So I soaked up as much as I could, left all the windows open in my car, and left a towel down in there overnight… but what do you think my next step should be? I can’t imagine having that much water underneath my car flooring is good, haha.

Anyone else have this problem? If so, what fixed it? My car is still under warranty from the dealer I bought it at (in Portland, OR area) so I am hoping this is covered. Any tips or clues? Thanks for the help.

 

There is a vent under the passenger seat that is part of the rear AC.
I'm not certain if that is it or not as I've never looked myself.
It is possible to get moisture under certain operating condition with and AC system vehicle/home/airplane or wherever.
Getting enough to soak the carpet means something is not working correctly.
You are under warranty, so definitely take it to the dealer and have them investigate the cause.

 

Also, clogged sunroof drains can cause this.

 

I like the sunroof drain suggestion. Blowing out the drain holes with compressed air would fix it.

Similarly, water that condenses when using the AC drains through a tube to the outside. These can get clogged and the water will back up into the passenger compartment.

A wet/dry vacuum can help to get more of the wetness out of the carpet. I once had a similar issue (not with the Mazda) from a sunroof clog and had to remove the trim along the passenger door sill to pull back the carpet to let air circulate. I also used a fan to expedite the process.

 

Sometimes the rubber around the sunroof gets stuff stuck on it opening access to water entry. Every year or two clean the rubber with a rubber/ vinyl treatment to restore pliability.

 

Utilise your warranty and take it back to the dealership & let them take care of it.

 

Ditto.