"When it Rains it Pours!" - Pool of water under carpet of backseat / driver side

Dear Prius Family,

For weeks, if not months now I have dreaded the rain. I can not seem to find where water is getting into my Prius. It collects behind the drivers seat under the carpet. At this point, i have taken out the center console, passenger seat and rear seat cushion thinking my only option was going to be to pull up the carpet and watch while my wife sprays the exterior with a hose hoping to spot the intrusion.

I have not pulled the carpet up just yet. I am crossing my fingers that someone here may have had a similar problem and some advice before I take the next steps which appear to be much more difficult than I bargained for.

Any advice whatsoever would be wonderful!

Desperate first time visitor,

Brian

 

Thank you for the reply MIKE!

Water definitely comes in while the car is parked OR moving.
I have not looked at the drain holes specifically to make sure they are 'actually' draining.. Brilliant!
Do you know of a schematic or drawing that indicates where they all are located?

Thank you Bisco!

At one time both of the areas you describe (Spare Tire & 12v Battery area) have collected water. I have removed rubber drain plugs from each area to ensure water no longer collects in these areas. I suppose i could do the same under the driver side back seat but I'm running out of "Band-Aids" :-?

Do you know of any photos or drawings that might help me trouble shoot the Rain Gutters you mention?

Thanks for the link! There are certainly enough ideas in that thread to keep me busy for a while. I just ran out to take a quick look for the cracks in the seems near the hatch. Yep! There are there and on both side. Seems so illogical that such small cracks could allow this much water to get into the cabin.

But first things first.. lets seal those cracks..

Thanks much!