Oxygen Sensor Replacement at your home or office.

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How much does Oxygen Sensor Replacement cost?

It depends on the type of car you drive and the auto repair shop you go to. Our mechanics are mobile, which means they don't have the overhead that repair shops have. They provide you convenience by coming to your home or office.

YourMechanic Price
$96 to $472
Labor: $70 -$192
Parts: $26 -$280
Average Dealer price
$146 to 783
Average Shop price
$116 to 550
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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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ServiceYourMechanic PriceShop/Dealer Price
Oxygen Sensor - Rear/Lower/Downstream Replacement for 2002 Subaru Forester H4-2.5LYourMechanic Price$237.29Shop/Dealer Price$292.15 - $407.70
Oxygen Sensor - Front/Upper/Upstream Replacement for 1994 Mazda 323 L4-1.6LYourMechanic Price$131.09Shop/Dealer Price$160.95 - $217.72
Oxygen Sensor - Front/Upper/Upstream Replacement for 1984 Chevrolet G10 L6-4.1LYourMechanic Price$105.82Shop/Dealer Price$129.32 - $167.09
Oxygen Sensor - Front/Upper/Upstream Replacement for 2001 Mercedes-Benz ML430 V8-4.3LYourMechanic Price$255.27Shop/Dealer Price$327.08 - $485.15
Oxygen Sensor - Rear/Lower/Downstream Replacement for 1992 Chrysler New Yorker V6-3.8LYourMechanic Price$145.29Shop/Dealer Price$178.65 - $246.01
Oxygen Sensor - Rear/Lower/Downstream Replacement for 1988 Ford F-150 V8-5.0LYourMechanic Price$113.28Shop/Dealer Price$138.62 - $181.97
Oxygen Sensor - Rear/Lower/Downstream Replacement for 2011 GMC Yukon V8-6.2LYourMechanic Price$161.20Shop/Dealer Price$198.61 - $277.97
Oxygen Sensor - Rear/Lower/Downstream Replacement for 1985 Chevrolet Caprice V8-5.0LYourMechanic Price$105.82Shop/Dealer Price$129.36 - $167.16
Show example 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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Meet some of our expert mechanics

Real customer reviews from owners like you.

471 reviews
Peter
38 years of experience
As I write this, Peter is working on my car and being very articulate and explaining it all to me. I am very pleased with his performance, One thing I will say about Peter is definitely "My Mechanic"!
2000 FORD TAURUS - OXYGEN SENSOR REPLACEMENT (REAR/LOWER/DOWNSTREAM)
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268 reviews
Richard
16 years of experience
Richard was very knowledgable; he answered all of my questions in regards to the work being done through out the process. He exchanged my parts and got my car running smoothly.
2006 CHEVROLET COBALT - OXYGEN SENSOR REPLACEMENT (FRONT/UPPER/UPSTREAM)
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136 reviews
Casey
19 years of experience
This was a great experience!
1999 HONDA ACCORD - OXYGEN SENSOR REPLACEMENT (FRONT/UPPER/UPSTREAM, REAR/LOWER/DOWNSTREAM)
Want Casey's expert advice? Ask your question now. Its free!
110 reviews
Joel
16 years of experience
Joel was great! On time, punctual, professional and very nice! He got rid of my Engine Power Reduce error and it has not come back on yet. I had my doubts about using a stranger to fix my car but Joel took away all my fears. It was a pleasure and I look to using Joel again in the very near future.
2007 CHEVROLET IMPALA - OXYGEN SENSOR REPLACEMENT (FRONT/UPPER/UPSTREAM, REAR/LOWER/DOWNSTREAM)
Want Joel's expert advice? Ask your question now. Its free!
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
ServiceYourMechanic PriceShop/Dealer Price
Oxygen Sensor - Rear/Lower/Downstream Replacement for 2002 Subaru Forester H4-2.5LYourMechanic Price$237.29Shop/Dealer Price$292.15 - $407.70
Oxygen Sensor - Front/Upper/Upstream Replacement for 1994 Mazda 323 L4-1.6LYourMechanic Price$131.09Shop/Dealer Price$160.95 - $217.72
Oxygen Sensor - Front/Upper/Upstream Replacement for 1984 Chevrolet G10 L6-4.1LYourMechanic Price$105.82Shop/Dealer Price$129.32 - $167.09
Oxygen Sensor - Front/Upper/Upstream Replacement for 2001 Mercedes-Benz ML430 V8-4.3LYourMechanic Price$255.27Shop/Dealer Price$327.08 - $485.15
Oxygen Sensor - Rear/Lower/Downstream Replacement for 1992 Chrysler New Yorker V6-3.8LYourMechanic Price$145.29Shop/Dealer Price$178.65 - $246.01
Oxygen Sensor - Rear/Lower/Downstream Replacement for 1988 Ford F-150 V8-5.0LYourMechanic Price$113.28Shop/Dealer Price$138.62 - $181.97
Oxygen Sensor - Rear/Lower/Downstream Replacement for 2011 GMC Yukon V8-6.2LYourMechanic Price$161.20Shop/Dealer Price$198.61 - $277.97
Oxygen Sensor - Rear/Lower/Downstream Replacement for 1985 Chevrolet Caprice V8-5.0LYourMechanic Price$105.82Shop/Dealer Price$129.36 - $167.16
Show example Oxygen Sensor Replacement prices

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