How to Buy a Good Quality Oxygen Sensor

Oxygen sensors help your vehicle control both the fuel and ignition systems, making it a critical component to ensure your car is running and starting smoothly. Boost your ride’s fuel performance and improve emissions output with a properly-functioning oxygen sensor. Anytime you replace your catalytic converter, you should also consider replacing your oxygen sensor – or about every 60,000 miles.

Vehicles manufactured before 1980 do not have oxygen sensors; a component which measures the air to fuel ratio, feeding this data into the car’s onboard computer. Your gas bills could skyrocket if you don’t have an accurately-functioning oxygen sensor.

Failures are common when the incorrect oxygen sensor is installed in the wrong location. There may be as many as four oxygen sensors in your car, so be sure you’re getting the correct sensor into the right location. The variety of sensor codes and locations can make this a bit confusing unless you’re familiar with the layout.

Note: There are a variety of naming conventions for sensor banks; buying OEM parts may help alleviate confusion around this part.

The most common locations for oxygen sensors include:

  • Cylinder bank 1 is located near the engine’s cylinder 1; bank 2 is located opposite bank 1. Four cylinder engines only have 1 bank, while larger engines may have more.

  • Sensor 1 is located inside the sensor bank and is located directly upstream from the catalytic converter.

  • Sensor 2 is the downstream sensor; you can find this sensor inside the sensor bank - falling after the catalytic converter.

While sensor location is very important, finding the correct type of sensor should be very straightforward.

YourMechanic supplies top-quality oxygen sensors to our certified mobile technicians. We can also install an oxygen sensor that you've purchased. Click here to get a quote and more information on oxygen sensor replacement.


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Recent Oxygen Sensor Replacement reviews

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1,451
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Jose

12 years of experience
49 reviews
Jose
12 years of experience
Chevrolet Silverado 1500 V8-4.8L - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Moreno Valley, California
very knowledgeable and honest , professional and clean explain everything to me and answer all m,y question
Scion tC - Oxygen Sensor Replacement (Rear/Lower/Downstream) - Sun City, California
Arrived in a timely manner, was very professional and knowledgeable about any questions. Would definitely recommend to anybody (family, friends, etc) looking for a mechanic!

Joel

11 years of experience
146 reviews
Joel
11 years of experience
Honda CR-V L4-2.4L - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Frisco, Texas
I have not seen a more sincere and hard working person than Joel. This, on top of his great skills and know-how of working with an automobile and a very friendly, likeable personality. Unfortunately, it took multiple attempts to fix the Check Engine light on my vehicle. The car needed O2 sensor replacement but due to a couple of reasons the problem was not getting fixed. So Joel would come, run the tests, fix the problem, do the test drive, and leave thinking the problem has been resolved only to find out from me later that the Check Engine light is back on. However, Joel followed up patiently with me over the course of couple of months to ensure that the problem was fully resolved, even if it took him a couple of visits. Well, he has my business from now on and full trust for my cars! Thank you, Joel!
Ford Expedition - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Denton, Texas
Joel showed up right on time. Replaced O2 sensors on my Ford Expedition. Ran a diagnostic as well & verified fuel trims etc. Was in and out within an hour. Ensured my driveway was clean when he left and did not leave any mess. I was very pleased with his professionalism. Definitely recommend Joel for auto repair.

James

30 years of experience
873 reviews
James
30 years of experience
Toyota Camry V6-3.5L - Oxygen Sensor Replacement (Rear/Lower/Downstream) - Orlando, Florida
Mr. James dis an awesome job on my 2007 toyota camry. He was punctual and professional. He fixed the problem very quick.
Toyota Avalon - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Apopka, Florida
VERY WELL EDCUATED AND VERY SMOOOTH- I KNOW WHO TO CALL WHEN I NEED A SPARE HAND! LOL! AWESOME PERSON AND THANK YOU FOR SERVICES!

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Ford F-150 V8-5.4L - Oxygen Sensor Replacement (Front/Upper/Upstream) - Cedar Park, Texas
Shane is great. I will be calling on him soon on other vehicles I own. Thank you Shane for a great job.

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