Mazda 3 Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Mazda 3

Mazda 3 Oxygen Sensor Replacement costs $207 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$166 to $272
Labor: $70 -$80
Parts: $96 -$192
Average Dealer price
$285 to 477
Average Shop price
$203 to 323
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Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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CarServiceYourMechanic PriceShop/Dealer Price
2012 Mazda 3L4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$357.96Shop/Dealer Price$444.47 - $671.33
2016 Mazda 3L4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$307.56Shop/Dealer Price$381.54 - $570.65
2017 Mazda 3L4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$309.96Shop/Dealer Price$384.49 - $575.37
2009 Mazda 3L4-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$331.60Shop/Dealer Price$411.56 - $618.69
2008 Mazda 3L4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$331.60Shop/Dealer Price$411.53 - $618.63
2008 Mazda 3L4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$331.60Shop/Dealer Price$411.52 - $618.60
2010 Mazda 3L4-2.3L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$348.36Shop/Dealer Price$432.56 - $652.28
2018 Mazda 3L4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$293.16Shop/Dealer Price$363.54 - $541.84
Show example Mazda 3 Oxygen Sensor Replacement prices

Oxygen Sensor Replacement Service & Cost

What is the Oxygen Sensor all about?

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.

Oxygen Sensor-MATROX-1

Keep in mind:

  • Many oxygen sensors are damaged by leaking oil or coolant. If that is the case, the cause of that leak needs to be identified and repaired, or else the replacement oxygen sensor will be damaged as well.
  • New vehicles require specific oxygen sensors, and not the universal sensors that were common prior to 1996.

How it's done:

  • Scan the computer in the car for codes.
  • Inspect for vacuum leaks and holes in the exhaust system.
  • Remove and replace the oxygen sensor if it is bad.
  • Check electrical connections.
  • Check for proper operation of oxygen sensors.
  • Clear diagnostic codes.
  • Test drive car.

Our recommendation:

Keep up with the tune-ups. If check engine light is on, don't drive the car too long without getting it inspected. If check engine light is flashing, pull over and get the car towed to avoid costly repairs. Ask the mechanic to inspect the vacuum hoses and leaks in the exhaust system. If the vacuum hose or exhaust system is leaking, it will display an oxygen sensor fault code. Replacing an oxygen sensor may not fix the problem.

What common symptoms indicate you may need to replace the Oxygen Sensor?

  • Check Engine light is on.
  • Car is getting poor gas mileage.
  • Emission test fails.

How important is this service?

Your vehicle has multiple oxygen sensors, and they all help the car run optimally. The front sensors measure how much oxygen is in the exhaust stream to measure how rich or lean the gases leaving the gas chamber are. The rear sensors measure the oxygen content of the gases as they leave the catalytic converter. The oxygen sensors then relay this information to your vehicle’s electronic control unit, so that it can adjust as necessary. Because cars depend on an ideal fuel-to-air ratio to function optimally, the oxygen sensors are leaned on for engine performance. When your oxygen sensors fail your car will run less smoothly, get worse mileage, and have worse emissions.

Fast and easy Oxygen Sensor Replacement service at your home or office.

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Excellent Rating


Mazda 3 Repair

Average Rating

4.6/5

Number of Reviews

5,830

Rating Summary
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Meet some of our expert Mazda mechanics

Real customer reviews from Mazda owners like you.

Jose

13 years of experience
432 reviews
Jose
13 years of experience
Jose was awesome! He was right on time and got the repair done faster than I thought. He was also thorough in his work, and took his time explaining exactly what was wrong with my vehicle, what he did to fix it, and made sure that nothing else was amiss. He came prepared with the right equipment and was very clean with the work. Should I need to use YourMechanic again, I'll ask for him. :)
2008 MAZDA 3 - CAR THERMOSTAT REPLACEMENT - VANCOUVER, WA

Joel

17 years of experience
392 reviews
Joel
17 years of experience
Once again, Joel was a great choice for my mechanic. He was punctual and professional and quick. It took him 25 minutes to do an estimated 1 hour repair. And everything works great now in my 2011 Mazda 3.
2011 MAZDA 3 - HORN - JACKSONVILLE, FL

Chris

12 years of experience
348 reviews
Chris
12 years of experience
Fast and easy, helped me learn some stuff too!
2004 MAZDA 3 - OXYGEN SENSOR REPLACEMENT (FRONT/UPPER/UPSTREAM, REAR/LOWER/DOWNSTREAM) - DALY CITY, CA

David

12 years of experience
210 reviews
David
12 years of experience
David promptly inspected my car and was honest. Very nice and knowledgeable, very easy to converse with.
2006 MAZDA 3 - BRAKE SYSTEM INSPECTION - SACRAMENTO, CA
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
2012 Mazda 3L4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$357.96Shop/Dealer Price$444.47 - $671.33
2016 Mazda 3L4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$307.56Shop/Dealer Price$381.54 - $570.65
2017 Mazda 3L4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$309.96Shop/Dealer Price$384.49 - $575.37
2009 Mazda 3L4-2.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$331.60Shop/Dealer Price$411.56 - $618.69
2008 Mazda 3L4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$331.60Shop/Dealer Price$411.53 - $618.63
2008 Mazda 3L4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$331.60Shop/Dealer Price$411.52 - $618.60
2010 Mazda 3L4-2.3L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$348.36Shop/Dealer Price$432.56 - $652.28
2018 Mazda 3L4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$293.16Shop/Dealer Price$363.54 - $541.84
Show example Mazda 3 Oxygen Sensor Replacement prices

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