First, hello all, I'm new to the forum. Since that's out of the way, I have a question. I went through an automatic carwash yesterday for the first time since I got my '07 mazda 3(I usually do it by hand, but recieved a free carwash coupon). After I drove through the wash, I got out to vacuum the inside and found that behind the passenger seat, under the floor mat, the carpet was soaked. I'm the only person that has been in the car so I'm positive nothing was spilled, and there didn't appear to be any sign of a leak from any windows or doors. The only conclusion I can think of, is that the water came up through the floor, from the undercarrage wash. So I guess my question is, has anyone heard of something like this happening....is it a common thing(design flaw) with the mazda 3?