Oxygen Sensor Replacement Estimate for Mazda 3

Mazda 3 Oxygen Sensor Replacement costs $204 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$166 to $279
Labor: $70 -$80
Parts: $96 -$199
Average Dealer price
$285 to 491
Average Shop price
$203 to 332
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CarServiceYourMechanic PriceShop/Dealer Price
2007 Mazda 3L4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$190.62Shop/Dealer Price$235.29 - $336.65
2010 Mazda 3L4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$193.48Shop/Dealer Price$238.94 - $342.49
2012 Mazda 3L4-2.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$229.13Shop/Dealer Price$283.45 - $413.71
2013 Mazda 3L4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$222.76Shop/Dealer Price$275.52 - $401.01
2011 Mazda 3L4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$186.73Shop/Dealer Price$230.44 - $328.88
2008 Mazda 3L4-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$190.62Shop/Dealer Price$235.29 - $336.64
2008 Mazda 3L4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$191.18Shop/Dealer Price$236.08 - $337.91
2010 Mazda 3L4-2.3L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$222.76Shop/Dealer Price$275.54 - $401.05
Show example Mazda 3 Oxygen Sensor Replacement prices
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Parts required for a Mazda 3 Oxygen Sensor Replacement

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223 reviews
Joe
38 years of experience
Joe was great! Very friendly, very open, told me in detail about the repair and made me feel very confident in the repair. This was my first time using the service; I would definitely recommend it!
2008 MAZDA 3 - AC LOW PRESSURE HOSE REPLACEMENT
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186 reviews
Isai
22 years of experience
Isai was fantastic and quick! He talked to me about my problem and gave suggestions for future needs that made sense, didn't seem like it was all about the additional money at all. Great experience. He was in and finished in...20 minutes? I was expecting over an hour! Problem fixed and I left with a better understanding of what had happened.
2004 MAZDA 3 - ENGINE MOUNT REPLACEMENT (SIDE)
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184 reviews
Tom
37 years of experience
Tom was absolutely fantastic. When you're buying a used car is easy to feel vulnerable. Because of Tom's inspection I was able to feel confident I was making the right choice. I would totally use Tom again. Thanks, Tom!
2010 MAZDA 3 - PRE-PURCHASE CAR INSPECTION
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174 reviews
Scott
31 years of experience
Scott was wonderful he was very quick to find out what was wrong and even offered to come on a weekend to fix my car. He was very courteous and even explained to my girls what he was doing with a smile
2004 MAZDA 3 - CAR IS STALLING 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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