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Water puddle on floor board - 2009 Scion tC

Posted by Jackie domenech on


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Passenger side? May be coolant from a leaking heater core. Does the water smell sweet? If the A/C has been in use it could also be a clogged evaporator drain. The frost on it melts and needs to drain.

Has it been in the rain or is this after its washed?
Maybe a leak in the windshield or something along the firewall. Have one person inside the car and another with a water hose on slow. Starting low, move the water hose slowly along the firewall, near the wipers working up. The person on the inside will watch for water to start running in.

Posted on Oct 10, 2011

  • Jackie domenech Oct 10, 2011

    It rained over night, when we got in the car this morning there was a puddle on the floor board passenger side in the back seat. Its taken 8 towels to try to soak up..nothing else in the car was wet. Seats were dry..only the floor board was soaked.we have no clue where the water came from

  • MadMikeRS Oct 10, 2011

    Well you can rule out the heater core. Does it have a sunroof? Headliner dry?
    Maybe a side window is leaking. It could leak down behind the panel and run out at the bottom onto the crapet. Since its a 2009, warranty may cover it. The interior panel may need to be removed and the water hose trick along the side window to find if its leaking.



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