My car started having this problem at about 12,000 miles and it has almost 16,000 on it now. I don't know if the padding is ruined but it sure does smell after it has been wet for awhile. At least the dealership cleans the carpets everytime I bring it in so the smell is gone when I pick it up.
The deflector is like a plastic sheeting that goes on the door behind the door panel. It is supposed to keep water away from the enterior of the car and channel it towards the drain holes in the bottom of the door.
So is the water actually coming in from somewhere up above and getting back behind the seals because of the deflector being bad?
The water gets in from around the door windows. The window seals are not water tight because the windows move up and down. In the case of my car the deflector was damaged, installed incorrectly, not glued on properly, defective, whatever I heard it all. Because of this the water would come into the car instead of going through the drain holes in the bottom of the door. They told me that there is a service bulletin about this but I dont remember the number. Whatever the case it seems like there are a few people that have been having this problem. I hope that this will not be a recurring issue for the remainder of the car'* life.