My 2006 Volvo s40 has water in the rear passenger floor board. I looked under the seat and found where the dealer had knocked off what I was told is a vent. I'm not sure if its possible for the air conditioner being put back together that could cause this or if its the sunroof.I recently had my air conditioner module replaced at the dealer it didn't leak before. Does anyone know how I can check to see what it is before I take it back? Thanks

 

Did you ever find out what the problem was? I'm having the exact same issue and was just curious...

Thanks!

 

The sun roof drain and dash drain were clogged. My mechanic used compressed air to blow them out, he said if you park under trees to clean up all the leaves and needles regularly. He only charged 40 to do it but the dealership said it would be almost 400, I would definitely call ahead to find out first. good luck