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Water accumulating on rear floor

sufor415sufor415 Member Posts: 1
edited June 2016 in Toyota
A couple of days ago, my wife noticed that the floor mat on the rear passenger side of her car was sopping wet. She thought perhaps a water bottle must have spilled or leaked, so she soaked up the water and dried out the mat. Today, the mat was wet again with about an inch of water accumulating only on the passenger side of the rear floor.

We have had no significant rain for more than two weeks; in fact, it's been sunny and hot with temps in the 90s. There is no water on the front floor or the rear driver's side floor. Due to the heat, we have run the AC, but it is working fine with no apparent leaks. There is no apparent leaking in the trunk or underneath the car. There are no apparent leaks from the radiator or hoses. Everything is working fine, except for the water on the rear passenger side floor. We can't figure out the source of the water. Please help! Thanks.

The car is a 2006 4-door Toyota Camry LE with 199K miles on it.


  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaMember Posts: 64,482
    Strange. So no car washes, things like that? No water bottle stuck under the driver's seat?

  • thecardoc3thecardoc3 Member Posts: 5,427
    You are running the AC, check the evaporator drain. There should be water dripping underneath the passengers side of the car when the AC is on.
  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaMember Posts: 64,482
    It's possible that the AC drain is plugged and moisture can "wick" right through to the back of the car. That is probably the lowest part of the floor pan so that's where it ends up.

    Logically, aside from what I posted, then Doc has to be right and this is an AC drain problem.
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