2008 VW Jetta leaking rain water, front driver's side far left under dash. Sunroof drain hole plugged w/ muck. Need diagram of exit drain plug for location? Need to remove anything to access?

hi i'm not familar with your car but if you can wind the sunroof back so the sunroof is fully open look at all four corners where the sunroof sits into there should be at least 2 drain holes which can over time become clogged with debris, if you find them use some warm water and flexi pipe to clean the drain holes out. hope this helps

If you have a sunroof it could be the drain that follows the front pillar letting out under the front fender. These hoses are known to plug and crack open releasing water into the floorboards.

Driver side door check along top and front edge for tears or twisted looses sections. Internal to the door water can drain down along the window and is released outside the door seal. If the bottom of the door has the opening that releases the water plugged then water will drain over into the floorboard.

Do you have a sunroof or moonroof? If so the problem is going to be in the drain for that sunroof or moonroof. If you open the roof, on either front corner you will see a small circular hole. Take some compressed air and blow it through each of those holes. You may see debris come out of the bottom near the back of your wheel well. Take cup of water and slowly pour that near those holes and make sure it goes through. Usually when that drain is clogged the water from a rain storm will flood into the passenger cabin.

open your skylight and feel in the front corners for muck stuck infront of the drainage holes. Use a pipe cleaner or other wire to poke through the holes and the water should drain out. It is a little difficult to see the holes but just feel around.

Does car have sunroof? If sunroof drains are plugged they overflow into car. To cure, blow compressed air through drain tubes.

My 06 was leaking during rain also. It turned out to be the sunroof. There are two drain tubes in the front of the sunroof that run the water down the corners to the ground and two drain tubes that drain water out the back corners. The water would seep around the glass, which is expected, but both of the tubes on the front of mine were plugged, and the water would overflow behind the dash and fill my floorboards. If my H3 was leaning to the left during a storm then the drivers side would be full of water. If leaning right, then the passenger side. I had to open sunroof and blow compressed air into the drain holes to clear them, but be careful, too much air will separate tubes from sunroof and then you will have to remove the inside paneling around sunroof to get to tubes and reconnect. You may only have one side plugged. you can test it by opening sunroof and pour a little water in the small catch pan in the front of the sunroof and see if it drains as expected (to the ground under the firewall on left AND right side). You can see the holes in each corner of catch pan to drain the water. Plug one with your finger, then the other to find the plugged side. Good luck!! Hope this helps!!

My 06 was leaking during rain also. It turned out to be the sunroof. There are two drain tubes in the front of the sunroof that run the water down the corners to the ground and two drain tubes that drain water out the back corners. The water would seep around the glass, which is expected, but both of the tubes on the front of mine were plugged, and the water would overflow behind the dash and fill my floorboards. If my H3 was leaning to the left during a storm then the drivers side would be full of water. If leaning right, then the passenger side. I had to open sunroof and blow compressed air into the drain holes to clear them, but be careful, too much air will separate tubes from sunroof and then you will have to remove the inside paneling around sunroof to get to tubes and reconnect. You may only have one side plugged. you can test it by opening sunroof and pour a little water in the small catch pan in the front of the sunroof and see if it drains as expected (to the ground under the firewall on left AND right side). You can see the holes in each corner of catch pan to drain the water. Plug one with your finger, then the other to find the plugged side. Good luck!! Hope this helps!!

Hey I have the same problem, but only when it rains, it comes from the sunroof then leaks into the carpet.

There are drains that go from the factory sunroof down the frame and come out in the door frame. If you open your front driver's door and look at the forward part of the door frame you will see what I am talking about. Make sure these drains aren't clogged. If you can find something stiff enough to force down the drain, but still flexible enough to go through all the turns and not poke through the tubing you can push out any gunk. With the sunroof open you should be able to see the holes around the edge of the sunroof frame. These drains are why there are fewer problems with the factory sunroof versus an aftermarket one. Even if some water gets through the seals it has a place to go. Other than that the door seals are really the only other place prone to leaking unless there is some hole in the floorboard. But that would be strange.

There is one more longshot place. In the front drivers side under the dash there are some holes to pass through wires to the engine bay. These holes have grommets that keep water out but if someone did some aftermarket work on the car they may have added wires here and not sealed everything up tight.

Since the water is on the drivers side only I'd start by taking a quick look at the door seals on that side. The driver's door is a good candidate for problems since it is used the most. Also, if the seals are bad you might be able to notice more road noise when driving. Goodluck.