Oxygen Sensor Replacement Estimate for Mazda 323

Mazda 323 Oxygen Sensor Replacement costs $125 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$119 to $138
Labor: $70 -$80
Parts: $49 -$58
Average Dealer price
$191 to 208
Average Shop price
$145 to 155
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CarServiceYourMechanic PriceShop/Dealer Price
1992 Mazda 323L4-1.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$131.70Shop/Dealer Price$161.65 - $218.82
1989 Mazda 323L4-1.6L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$122.18Shop/Dealer Price$149.81 - $199.89
1989 Mazda 323L4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$122.18Shop/Dealer Price$149.77 - $199.81
1994 Mazda 323L4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$131.09Shop/Dealer Price$160.93 - $217.67
1991 Mazda 323L4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$132.24Shop/Dealer Price$162.34 - $219.92
1993 Mazda 323L4-1.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$131.70Shop/Dealer Price$161.64 - $218.81
1994 Mazda 323L4-1.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$131.99Shop/Dealer Price$162.09 - $219.54
1990 Mazda 323L4-1.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$130.56Shop/Dealer Price$160.29 - $216.65
Show example Mazda 323 Oxygen Sensor Replacement prices
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Parts required for a Mazda 323 Oxygen Sensor Replacement

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287 reviews
Steven
9 years of experience
excellent work and very friendly and explaining everything to you.
2001 MAZDA PROTEGE - BRAKE SAFETY INSPECTION INSPECTION
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124 reviews
Jerel
6 years of experience
Arrived early, very pleasant and performed all work in fabulous fashion!
2005 MAZDA 6 - OIL CHANGE
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Robert
27 years of experience
Robert was very diligent, helpful and flexible. He also gave great advice on how to maintain my car and explanations of the issues I was facing. When I called with last minute requests of things to check/change for my service he was very flexible and very responsive.
2004 MAZDA 6 - IDLER PULLEY REPLACEMENT
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Chris
13 years of experience
He was friendly and seem knowledgeable, I like that he was honest with me
2009 MAZDA CX-7 - CHECK ENGINE LIGHT IS ON 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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