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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James

23 years of experience
25 reviews
James
23 years of experience
Lexus ES350 - 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.

Chuy

14 years of experience
277 reviews
Chuy
14 years of experience
Toyota Corolla - Oxygen Sensor Replacement (Front/Upper/Upstream) - Chicago, Illinois
Outstanding performance done by Chuy. Not only he did what I asked to do, but also he took care of small details that I would have not caught otherwise! I’d ask Chuy for any other services in the future.
Subaru Outback - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Villa Park, Illinois
Church had to work extra hard to make sure that the repairs were properly done. The work was completed to my satisfaction. Thank you.

Kenneth

20 years of experience
653 reviews
Kenneth
20 years of experience
Hyundai Santa Fe - Oxygen Sensor Replacement (Rear/Lower/Downstream) - Los Angeles, California
Kenneth came early and did the work in record time. He also made recommendations for additional things ne noticed needed to be done.
Chevrolet Suburban 2500 - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Pico Rivera, California
Great communication with updates on vehicle status and recommended services. Would recommend and book again for maintenance needs.

Gustavo

17 years of experience
269 reviews
Gustavo
17 years of experience
Chevrolet Cruze - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - San Antonio, Texas
There is nothing negative to say about the services rendered. Best experience ever getting a vehicle fixed. I will be a repeat customer.

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