We've had a lot of rain in Southern California this winter. So, now I have discovered the driver side floor mat is soaked. I'm thinking water is coming into the floorboard from the steering column. Possibly a missing or defective gasket or coupling boot? Anything suggestions.

 

Your sunroof drains are blocked. I have had mine cleaned so many times and they still get blocked. Last time , a bug was down the tube blocking it. Volvo recommends cleaning every 7500 miles or at oil change. Why can't Volvo fix this ???? A design flaw as this is the only car I have ever had this problem. My car is in Florida and it is stored in a closed garage.

 

I don't have a sunroof....

 

, There was also a problem with the adhesive used to install the glass windshield. Volvo repaired this free for many owners. You will have to go back to the dealer

 

Hi @mike91711 ,
Have you had any luck figuring out where the water is/was entering the car?