Lift the carpet on the passenger side of the central tunnel in the front footwell, locate black rubber hose going from ac overflow to the tunnel wall, pull the end from the wall, shave the lips on that rubber fitting slitely off and reinstall. Rubber became to sticky to open under water preassure.
chances are its a leaking brake booster or rear seal on master cyl.
From what I hear it has something to do with an "o" ring not being installed on the air conditioner are. Not sure what that means but apparently it is a known issue.
Heater core leaking?
Are you running the air conditioner? If the drain line is plugged, it will leak water (condensation) onto the passenger side floor.
Heater core is leaking. Air Conditioner drain hose is plugged.
Heater core failure.
Check your heater core under your dash.
The heater is leaking coolant.
Place a white towel on the floor of the car if when you press it down on there and the liquid is green its coolant leaking into your car it could be coming from a hose or your heater core
Can be a leaking heater core if the fluid taste sweet. Can also be the drain tube for the windshield cowl is stopped up.
Water is leaking on passenger side floor board when heat is on
could the airconditioner be leaking lots of water on the floor board of the car