My car is leaking when it rains. I end up getting a pool of standing water in the front passenger seat. It doesn't seem to be coming in through the roof, but rather through the side. I think it has something to do with the sunroof drainage system, but I just don't know.
Water Leak on 2002 Volkswagen Jetta TDI
by Visitor in Seattle, WA on December 12, 2010
ANSWER by goodguysdiesel , January 12, 2011
It is either related to the sunroof drainage system or there is a build up of leaves in area between the engine bay and the body of the car. You can remove the plastic area at the bottom of the windshield and blow out any debris in there. Or the sunroof drains which you have to pull off some of the moulding on the bottom inside of the door by the floor board.