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There is a small black hose sticking out from the passengers fire wall and has been leaking out water over the last couple of days from having the heater on inside the car. The hose is under the passenger side part of the car up by the

fire wall or heater core area. Is this normal for this car? Is it a cool off or overflow hose?

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Q: How do change a heater core in a Lexus Rx 300?
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