Oxygen Sensor Replacement Estimate for Mazda Protege5

Mazda Protege5 Oxygen Sensor Replacement costs $297 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$243 to $361
Labor: $70 -$80
Parts: $173 -$281
Average Dealer price
$439 to 655
Average Shop price
$299 to 434
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CarServiceYourMechanic PriceShop/Dealer Price
2002 Mazda Protege5L4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$373.52Shop/Dealer Price$463.92 - $702.46
2002 Mazda Protege5L4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$253.32Shop/Dealer Price$313.74 - $462.17
Show example Mazda Protege5 Oxygen Sensor Replacement prices

Parts required for a Mazda Protege5 Oxygen Sensor Replacement

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341 reviews
Honorio
14 years of experience
Great mechanic. Very professional, arrived exactly on time, very timely repairs for 2 of my cars back to back. Friendly and knowledgeable explanations, too.
2006 MAZDA 6 - OIL CHANGE
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Jamahl
15 years of experience
Very professional, personable and does a great job! Will always look for Jamahl when he is available and I'm in need of top help!
2005 MAZDA 3 - SERPENTINE/DRIVE BELT REPLACEMENT
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Grzegorz
36 years of experience
Quick and thorough. Diagnosed another problem while there. Thanks!
2009 MAZDA 5 - POWER STEERING FLUID SERVICE
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246 reviews
Godwin
19 years of experience
Great service
2002 MAZDA PROTEGE5 - CAR IS NOT STARTING INSPECTION
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All about Oxygen Sensor Replacement

With each new model year, manufacturers are adding more oxygen sensors to better manage engine operation. Some high performance engines have an oxygen sensor for each cylinder as well as one for the rear of each catalytic convertor. The sensors are located either underneath the hood or underneath the car. The oxygen sensors are connected (screwed) to the exhaust pipe, either in front or back of the catalytic converter. The front (upstream) sensors measure the amount of oxygen in the exhaust system. The purpose of the front oxygen sensor(s) is to measure how rich or lean the gases are as the gases exit the combustion chamber. Depending upon whether the exhaust gas is lean (high in oxygen content) or rich (low in oxygen content), the amount of fuel entering the engine is adjusted by the engine management computer to try and maintain an ideal mixture that produces the lowest emissions output from the catalytic convertor. Rear (downstream) sensors are located behind the catalytic converter. The purpose of the rear oxygen sensor(s) is to monitor the oxygen content of the exhaust gases leaving the catalytic convertor. If one or more of the oxygen sensors are faulty, your car may not pass the emissions test. If you drive your car with a faulty oxygen sensor, you may get poor gas mileage and it can damage the catalytic converter.

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