I am the proud new owner of a 2001 s40. We have had couple of weeks of bad rain and i have had 1-2 inches of water in the passenger side floor board. I have vacumed it up and next time it rains it is back. I can't find where its coming in. Roof not wet around sun roof, no wetness around dash or door jams. Heeeeelp

 

Common cause posted is clogged sun roof drains. Uncertain on your model where they are located, perhaps someone will post it, or could be done by a local dealer.

 

I will check them out thanks