I have a 2008 Rav4 I didn't
I have a 2008 Rav4 I didn't have any issues for almost 7 years, then All of the sudden, I start seeing puddle of water on the passanger side. I didn't even bothered to take to a mechanic/service center because I know what they are going to say for a car of that old. Although the car was driven for 7years, it was in a mint condition and still is since I have also 535i of same year. With the Rav4, I have found 2 problems. Perhaps 3.
The first is through time, the prastic seal at the bottom of the front windsheild tend to degrade through time and seal detaches from the wind sheild letting water in to the cabin behind the glove box compartment. I easily sealed it with silcon and worked well for many years until a month ago when the crack widened again.
The 2nd case I found wctually during summer, there is an air inlet coverd with plastic sheild but have a gap on the passangerside (at least on my model. Debries got in to AC system and clogged the drain pipe which is located on the middle corner of passanged side where passanger side left foot rests. The condesate from AC system was backed up and the container was so full ly start spilling over to the driver side. I could easily hear water swaying side to side and making sound as if someone is swimming in a pool specially when I make turns. I took the passanger floor apart, removed carpet, pad, and the foam, opened the holes on the foor and disconnected the black plastic drain pipe from the bottom of the condensate container, tugged in the blogged outlet and removed the debries. It seemed as if I opened a dam. Problem solved. The 3rd case is there is a chance minimal amount of water would seep in through air inlet on passager side specially during heavy rain or if the cover is detached for any reason.
I hope this helps.