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Q: I have a water leak in the passenger floor

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I'm having problems with unknown leak that only comes from the passenger side and soaks the carpet? Does anyone know what plug I have to drain or if this is major issue.

My car has 136000 miles.
My car has an automatic transmission.

This is likely a failing heater core problem. As you may know, the heater core is a unit that circulates hot coolant through a radiator like component that uses this to create heat when you turn your heater on. The leaking on the floor is most likely a result of a leak in your heater core hose. I would suggest having a professional from YourMechanic come to your location to diagnose and repair this.

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