My girlfriend's 2003 V40 has been getting damp on the passenger side during heavier rains for a little while now, however last weekend there was a good 1+ inches of water on the front passenger side floor. So whatever is wrong is getting worse. I figured it was the sunroof drain but can't find where the hose is routed. I ended up removing the passenger seat and the front passenger carpet. When I did this I found the water was also on the rear passenger floor. Also there was a hose running from under the dash along the floor all the way back and went somewhere behind the rear seat, I have no clue what that is but it seems the water lies along that hose. Coincidence maybe? I thought the sunroof drain would drain behind the front wheel. So basically I'm looking for a sunroof drain diagram, explanation for that hose, and any other pointers because honestly this is something I've never felt with before and is kind of overwhelming especially with how busy I am. Thanks all in advance

 

I just fixed mine, the drain hose pops out or over time get a bit shorter
is a good video showing you how to fix it

 

Yes this is the videos and threads I keep seeing. But these must be slightly newer Volvo's, mine doesn't have the drain hose behind the panel like that, it must actually be in the pillar itself, can't figure out where the hose runs tho to find the leak