I have the '05 tacoma double cab 4x4, and we have been getting a lot of rain here in Nor. California. I opened up the driver side door a few days ago and found that the floorboard on driver's side was completely soaked with water. I would say that I must have vacuumed out almost 2 liters of water. The passenger side was fine and the rear floorboards seemed to be fine. I thiought that perhaps I was going in and out of the truck so many times during the heavy rainfall that the water just accumilated over time. Well, I dried it out and installed my new all-weather mats from Toyota. Yesterday it rained, and today there were sprinkles throughout the day. I checked the driverside floorboard and it was wet again!! It is obviously I have found a bad leak. I checked to see if the water was running down the left side kick panel ( to the left of where your calf would be) and could not find any. I ran my hands over the pedals and things that were above to try and find any drips, but nothing. I dont thinking that it is coming from above, because I have installed the all-weather mats, and they are made of rubber. I'm wondring if the leak is coming from the bottom door jamb, or perhaps from underneath the floorboard itself. Anyone else have this worrysome problem???