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.

Oxygen Sensor Replacement pricing for various cars

CarsEstimateParts CostLabor CostSavingsAverage Dealer Price
2013 Volkswagen Golf$249$169.16$79.999%$276.66
2008 GMC Sierra 3500 HD$298$218.46$79.998%$325.96
2008 Honda S2000$378$298.33$79.996%$405.83
2015 BMW Z4$411$186.94$223.9715%$487.94
2012 BMW 740Li$698$418.46$279.9612%$794.71
2014 Mercedes-Benz C63 AMG$669$588.56$79.993%$696.06

Oxygen Sensor Replacement Service

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

When replacing the oxygen sensor remember:

  • 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 replacing the oxygen sensor?

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.

Recent Oxygen Sensor Replacement reviews

Excellent Rating


Rating Summary


20 years of experience
583 reviews
20 years of experience
Chevrolet Traverse V6-3.6L - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Salt Lake City, Utah
Very professional and nice guy. Only thing that I would recommend is resetting the oil life on the car. I’m sure he tried and thought he did it, cause when I got into the car and turned it on the settings was on the oil life but it wasn’t reset. Other than that he was great and work was done quicker than I thought. I wanted to tip him but I was picking up my kids from school and by the time I got home he was done. I would totally recommend him.
Hyundai Accent - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Salt Lake City, Utah
Came early, very communative about everything he did, when he was on his way, overall Great experience, would def use his service again!


34 years of experience
391 reviews
34 years of experience
Ford Focus L4-2.0L - Oxygen Sensor Replacement (Front/Upper/Upstream) - Avondale, Arizona
Very awesome Mechanic, he is on time amd efficient and his work, also keeps you up to date on maintaining a healthy car , I love my car and would rely on anyone else but William, Great Job !!
Hyundai Veracruz - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Phoenix, Arizona
Extremely knowledgeable very nice great social skills first time dealing with a mobile mechanic and now will definitely not be my last and this is a review from someone who has Chrysler Ford and Chevrolet factory training 20 years ASE mechanics experience


32 years of experience
140 reviews
32 years of experience
GMC Safari V6-4.3L - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Lafayette, Colorado
Perfect service - early, got the job done, tested afterwards, very knowledgable and experienced. Would use again in a heartbeat. Thanks Stephen
Honda Fit - Oxygen Sensor Replacement (Front/Upper/Upstream) - Lafayette, Colorado
On time, quick and professional. I will be calling him again in the future! Thank you for fixing Betsey.


23 years of experience
65 reviews
23 years of experience
Lexus ES350 V6-3.5L - Oxygen Sensor Replacement (Front/Upper/Upstream) - Marietta, Georgia
James was great!! He answered all my questions, was patient and professional. I don’t want to have to use a mechanic any time soon but if I have to I would request James.
Chevrolet Malibu - Oxygen Sensor Replacement (Front/Upper/Upstream) - Austell, Georgia
Very nice, very knowledgeable, and got the job a lot quicker than I expected. He even recommended what should be done next. Extremely helpful. Would recommend.

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