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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
2016 Chevrolet Silverado 1500$268$122.36$145.99-16%$229.86
2010 Hummer H3$301$155.18$145.99-14%$262.68
2008 GMC Canyon$301$155.18$145.99-14%$262.68
2013 Audi allroad$438$291.58$145.99-9%$399.08
2016 BMW 640i Gran Coupe$919$408.18$510.96-17%$784.43
2016 Jaguar XF$615$322.78$291.98-14%$537.78

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

(1,705)

Rating Summary
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Theodore

17 years of experience
1794 reviews
Theodore
17 years of experience
Toyota 4Runner V6-3.4L - Oxygen Sensor Replacement (Front/Upper/Upstream) - Sammamish, Washington
I am very happy with the service on my 2001 Toyota 4 Runner. Theodor replaced my Oxygen Sensor that was causing my check engine light to be on. He was very fast. I was given a price under what it would have been hsad I taken it to the dealer.

Attila

20 years of experience
1104 reviews
Attila
20 years of experience
Toyota Matrix L4-2.4L - Oxygen Sensor Replacement (Rear/Lower/Downstream) - Glen Ridge, New Jersey
Very reliable. Explains the work he did, so you can be reassured that he's legit. Travels to you making car maintenance accessible for nearly home bound immunocompromised people like me.

Gustavo

18 years of experience
575 reviews
Gustavo
18 years of experience
Chrysler PT Cruiser L4-2.4L - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - San Antonio, Texas
He arrived early and assured me that the O2 sensors would be replaced. He did notify me that if there was additional issues that the Cat would need to be replaced.

Justin

18 years of experience
2 reviews
Justin
18 years of experience
Nissan Rogue L4-2.5L - Oxygen Sensor Replacement (Front/Upper/Upstream) - Raleigh, North Carolina
Just doing above and beyond with the repairs in my car he noticed that the part I got was incorrect so he took me to AutoZone to switch out the part and that's above and beyond for me he didn't have to do it.

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