Originally Posted by Jordan Y.
Rear hatch leak->backseat->floor? Check that possibility if nothing else comes up. The hatches like to leak. They leak under the trim at the base of the glass, they leak through the grommet for the rear wiper, they leak through the weatherstripping, they leak through/into the taillights... and when they leak they can leak enough to flood the car all the way to the front.
Hrm, I never checked the backseat... Ill take a look. Its already pretty dry in the front, I just used 4 towels and soaked it up. Its the first time its ever done it and the car sits outside in the rain all the time. Im hoping I just left the door cracked open a bit or something...