Question about 2003 Mazda Protege

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My mazda5 protoege is over heating one auto tech told me i need to change the heat sensor.

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Thanks for choosing FixYa and welcome to the site. It is possible, but there are other things that can cause it as well. The most common of them all is a thermostat. Next, would be a water pump. Make sure it is not your coolant cap. It could be bad and need changed. They only cost a few bucks. Make sure you are not leaking fluid anywhere. Check your hoses and your clamps. Make sure you have the correct level of coolant. Make sure you check your fans to make sure they work. If they don't, check the fuse. Check your radiator as well. Anyone of these can make your car overheat. If you have a check engine light on, get a code. It can show the cause. If you have no light, check these above and you should find your issue. Thanks for using FixYa and have a good evening.

Posted on Apr 04, 2011


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Heated Oxygen Sensor (HO2S) SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Oxygen Sensor Wrench T94L-9472-A
Removal and Installation
NOTE: If excessive force is needed to remove heated oxygen sensor (HO2S) (9F472) , lubricate heated oxygen sensor with penetrating oil prior to removal.
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