I have an R reg Mazda 323F Executive and I have a problem with my passenger side footwells flooding. I have dried them out twice and plugged any places I think may be letting water in, but it is still occuring.

Has anyone experienced this problem before or do you have any ideas where my water may be coming from. The door seals are always dry, so it's not those.

Help!!

Take out all the carpeting and underpadding, etc., and any panels obscuring your view of the bottom of the dash and rocker area, just above the floor. Dry everything out, and have a good light handy. Get a friend to spray a good shower of water from the garden hose over the windshield area, then the door and pillar area, then the rocker panel area. You're inside, positioned to look for the first trickle of water creeping onto the floor. It may be coming from anywhere, and a trickle in the rocker area could be from a source above the windshield, so be prepared to investigate further for the source. That could be a windshield seal, door seal, window seal, rust hole, etc.
Also, look for light coming in from outside in the dark, to check for holes in the floor or places where gravity wouldn't move the water. Good luck.

Do have AC; if so, your evaporator drain line to the outside (underneath car) might be plugged with crap, might need to be cleaned out.

I agree with the above. Probably A/C evaporator drain.I had an oldsmobile that did the same thing,could never find the problem.I ended up drilling a hole in the floorboard in the carpet to drain the water.

It could also be caused by leaves and other debris clogging the fresh air intake.