if car is blowing cold air, you need to check the thermostat,the heater core, and the heat control. the coolant will not blow cold air unless there is no coolant at all in engine,then you have bigger problem anyway
bottom of the radiator
no sensor only a thermostat
there is a tap at the bottom of the radiator
The kind of antifreeze that is recommended for the 2004 Mazda Protege is the Genuine Mazda Long-life Coolant. You can also purchase Peak or Zerex coolants which are also considered compatible.
MY Mazda 1997 protege 1.5 takes the green one I think. and My car is a Canadian one meaning in winter it gets really cold. I love this car to death. Sam,
The coolant temperature sensor should be located near the upper coolant hose where it enters the engine block, just a few inches nearer to the windshield. It is usually a gold color.
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Right Rear of engine block. Above Alternator, Below coolant drain plug