10 Best Oxygen Sensor Reviewed 2021 And Buying Tips

Oxygen sensors are a new and developing technology that measures the amount of oxygen in a given area. The oxygen sensor helps monitor the health of the air or water, check for leaks, and monitor fire conditions. These devices have been used for years in various industries to detect oxygen levels, chemical concentrations, and corrosive gas. In fact, one of the most famous examples is an early warning system on the Space Shuttle Challenger which had a special sensor attached to it.

What is an oxygen sensor?

An oxygen sensor is a device that detects the presence of oxygen in an environment. It is used to detect leaks in gas or water pipelines, and it can also be used to indicate if there is an excess of oxygen.

What is an oxygen sensor? The term “oxygen sensor” is used to describe sensors that can detect the amount of oxygen in a given environment. This information can be used to determine the location of air leaks or other oxygen-deprived areas.

Types of Oxygen Sensors

There are basically four types of oxygen sensors in use today. They are zirconium dioxide, platinum resistance wire, optical-type sensor, and ceramic-type sensor. Of these four different types of sensors, only two of them are widely used due to various reasons. These two systems i.e., the platinum resistance wire (PtO2) and the optical-type sensor are used in almost all automobiles the world over.

The zirconium dioxide system is a cell that has a metal oxide semiconductor as the sensing element. The advantage of this system over other systems is it does not require any reference or control gas because zirconium dioxide itself oxidizes at high temperatures. This prevents the sensor from reaching a high temperature. However, the zirconium dioxide system has a disadvantage which is the slow response of this cell to changes in oxygen concentration.

The advantage of optical-type sensors is that it does not require any reference or control gas because they operate on the principle of measuring the oxygen concentration by measuring the light absorption. The disadvantage of this system is that it cannot operate at low temperatures.

The platinum resistance wire (PtO2) sensors are widely used because they are fast-responding, cheap, and cost-effective. These systems can also work reliably even at very low operating temperatures. Furthermore, these systems do not require any reference or control gas.

BMW has used an optical-type sensor (oxygen cell) in its automobiles until the mid-1980s. Now, BMW uses platinum resistance wire (PtO2) sensors for measuring the oxygen concentration in the exhaust gases of its vehicles.


10 Best Oxygen Sensor Reviews for This Year

If you are planning to buy oxygen sensor, then here is a list of the 10 best oxygen sensor reviews.

1. Bosch 15487 Oxygen Sensor, OE Fitment

How many times has your car’s oxygen sensor gone bad? When it does it causes a rush of problems from the check engine light to the car losing power and losing gas mileage. The sensor can even cause a serious problem with your car by preventing it from starting. If this happens, you could be left stranded all the way to a mechanic or a tow truck! Luckily Bosch has a great solution!

Bosch, America’s #1 quality automotive brand. They create innovative products that simplify driving and keep our customers safe. For over 140 years, Bosch has been building the most reliable, state-of-the-art products on the planet. We’re proud of this tradition and of the trust that their customers put in them every day.

Feature to Benefit

  • New Bosch 15487 Oxygen Sensor with OE fitment.
  • 100% Tested and Verified by our engineer team.
  • Engineered to make your vehicle’s performance better than ever before!
  • This is the best oxygen sensor for Lexus, Toyota.
  • Bosch oxygen sensors are guaranteed to fit.
  • They are great at sensing injectors and other engine parts.

2. Bsch 11032 Oxygen Sensor Original Equipment.

The Bosch 11032 Oxygen Sensor is a great upgrade that can be installed into any vehicle. These sensors are very popular because of the quality and features that come with them. These sensors are powerful and powerful, and can be used to improve fuel efficiency, keep your engine oiled properly and even diagnose a variety of engine issues.

When a part is doing its job it is crucial that you fix it before it fails completely. This can be a painful and expensive lesson to learn if you do not replace one of your car’s most important parts on time. It’s the oxygen sensor in your car’s catalytic converter. A faulty oxygen sensor can lead to a host of issues with your vehicle, including decreased fuel economy, check engine lights, and reduced performance. In most cases, sensors will need to be replaced once they

Feature to Benefit

  • Easy-to-install oxygen sensor.
  • Clean and reliable performance.
  • Low cost of ownership with a long, trouble free life span.
  • Replace your oxygen sensor to save money.
  • Replacing your oxygen sensors can improve fuel efficiency and reduce emissions.
  • Bosch is an OEM (original equipment manufacturer) supplier of products for many car manufacturers.

3. MOSTPLUS O2 Male Oxygen Sensor

MOSTPLUS is a brand that can be trusted for its excellence in fashion and fashion design. A fashion company whose sole objective is to make people look chic and fashionable. For more than a decade, they have been consulting fashion designers on how they can integrate more fashion into their products while also using more fashion designers on their team.

Your automotive lifestyle starts with your vehicle, and that is why you should always have a healthy relationship with the parts inside of it. Whether you’re driving a brand new car or you’re taking a trip in your old one, this MOSTPLUS product is a brilliant investment for a long drive!

Feature to Benefit:

  • Get this replacement sensor at a great price.
  • MOSTPLUS O2 Male Oxygen Sensor Up Down Stream Compatible with Ford F-150 F-250 5.4L (Set of 4).
  • Save time and money
  • Great for off-road adventures
  • Get the best of both worlds with a Jeep Wrangler.

4. Denso 234-4261 Oxygen Sensor

As a car owner, you care about your car. You’re spending money on it, so you better do everything you can to make sure it’s running properly! That’s why Denso’s oxygen sensor comes with an extra-long lifespan and is very easy to install. If your sensor stops working for whatever reason, you’ll know immediately so you can get it fixed as soon as possible, which is definitely worth the money!

In order to maintain the highest quality, Denso has developed a rigorous quality assurance process. Denso’s quality assurance is also uncompromising. All quality products meet stringent requirements and are subject to a broad range of testing and inspection by the world’s leading testing organizations.

Feature to Benefit

  • A genuine Denso oxygen sensor.
  • Part number 234-4261
  • This product is made in China.
  • Utilize this part for your Denso oxygen sensor.
  • It is a genuine Denso product so your vehicle will run properly.
  • The part comes with a warranty of 3 months or 12,000 miles.

5. MOSTPLUS O2 Oxygen Sensor Compatible GMC Sierra.

MOSTPLUS O2 Oxygen Sensor If you already have O2 sensors installed on your vehicle, then this product is perfect for you. This is a great accessory that will increase the performance of your fuel-injected vehicles. This car part will keep your engine operating at its peak performance.

It is said that water flows downhill. The same goes for oxygen sensor failures. That’s why it’s crucial to have an ideal oxygen sensor for your car. MOSTPLUS offers the perfect fit, quality, and compatibility with your vehicle. We make it easy to find the best oxygen sensor for your vehicle with our online shopping site.

Feature to Benefit

  • MOSTPLUS O2 Oxygen Sensor Compatible with 03 04 05 GMC Sierra 1500 5.3L 15284 SG1857
  • It’s quick and easy to install on your vehicle.
  • It is compatible with the latest GM car models.
  • Required to replace oxygen sensor.
  • Includes all required sensors and connectors.
  • Replaces original O2 sensor.
  • Includes new sensors.
  • Direct fit replacement for your vehicle.

6. Denso 234-4168 Downstream Oxygen Sensor

The Denso 234-4168 Downstream Oxygen Sensor with 4-Wire 13.7” Harness is an essential component in the monitoring of your engine’s air/fuel ratio. The sensor detects lean conditions and provides feedback to the ECU for the benefit of engine performance.

As the world’s leading supplier of emission recession products, Denso has risen to become an indispensable component of modern automobile emission control systems. Their products include fuel injection systems, catalytic converters, oxygen sensors, electronic air mass meters, intake valves, and many others.

Feature to Benefit

  • The Denso 234-4168 is a premium quality oxygen sensor.
  • This one features a 4 wire harness for easy installation.
  • A great addition to any engine bay with its high flow, low resistance design.
  • Denso 234-4168 Downstream Oxygen Sensor with 4-Wire 13.7” Harness

7. MOSTPLUS O2 Oxygen Sensor Front Rear Down/Upstream

The MOSTPLUS O2 sensor is compatible with Ford Mercury, Taurus, Sable, Montego, Grand Marquis, Escort, Mystique, Aspire/NIBURU, Cougar, and Grand National vehicles from 1996 – 2013. It is NOT for the Ford model years 2004-2005 or 2004 Mercury model years 1-4. The O2 sensor works by testing the oxygen levels in the exhaust system to ensure proper functioning of the engine.

When you have a problem with your car, you want it fixed as soon as possible. With this MOSTPLUS O2 sensor, you can find the problem faster and take action right away. This sensor is highly functional and can also keep your car running better for a longer time.

Feature to Benefit

  • O2 sensor is a device that checks the amount of oxygen present in your intake air.
  • A faulty or defective O2 sensor can increase your car’s emissions and make it less fuel efficient.
  • This part replaces the old one with brand new, high quality sensors.
  • Oxygen sensor front and rear compatible with your vehicle
  • Oxygen sensor is mounted on the upstream side of the Catalyst
  • Sensor is new design for improved performance of O2 sensors.

8. Ledaut O2 Oxygen Sensor Mounting Boss And Plugs

You can’t let your car breathe, can you? If you’ve been missing out on the incredible benefits of enhanced O2 sensors, LEDAUT is the only brand you should trust for this latest addition to your fleet. Now, your vehicle’s intake does not have to suffer from the lack of oxygen in the atmosphere because LEDAUT has a plethora of O2 sensor products for you to choose from at their stores.

LEDAUT is a company that makes a variety of products, some of the most popular being oxygen sensors, O2 sensor mounting kits, LED bulbs, and LED light strips. Their lights are fully waterproof and can be used in any environment from cars to boats to indoor lamps. They have been around for more than a decade and have built up a strong reputation. You can trust that when you purchase one of their products, you will get the best quality and the best possible outcome.

Feature to Benefit

  • Use this flexible plastic to mount your sensors.
  • With this flexible plastic, you’ll be able to mount your sensors with ease.
  • This sensor fitting boss will help protect the sensor mounting area on your vehicle’s bodywork.
  • Easy to install.
  • Maintain the best quality of your vehicle.
  • Prevent damage to other components.

9. GM Genuine Parts 213-3866 Heated Oxygen Sensor

General Motors Genuine Parts Heated Oxygen Sensor is part of the vehicle’s emissions control system and monitors the amount of oxygen added to the exhaust stream. Older vehicles that do not have a catalytic converter may have a catalytic converter that is affected by heat and may cause this sensor to fail.

Whenever you see your car get hot, you should know that you should replace the oxygen sensor. The oxygen sensor is a critical electronic component that regulates the combustion of air and fuel to ensure a safe and efficient engine. Replace it when it gets too hot, or replace it with a brand new one in case your current one is broken.

Feature to Benefit

  • The best parts for your car.
  • Save money with genuine GM parts.
  • No need to buy new when you can repair them yourself.
  • It’s always nice to help the environment.
  • Save money on fuel. Save money on your car payments too.
  • Reduce your environmental impact with this Genuine Part for your car, truck, or motorcycle engine.

10. YCT Oxygen O2 Sensor Upstream Downstream Fits

YCT is a leading brand of oxygen sensors positioned on downstream of the fuel injection system, which monitors the air/fuel mixture in the combustion chambers. With this product, our customers can solve engine-related problems caused by control system malfunction caused by poor fuel-air mixture quality.

Oxygen sensor is one of the most important components that can’t be replaced. Any damage or malfunction of the oxygen sensor will result in many problems, may cause coolant leakage, engine overheating, engine stalling, etc. The oxygen sensor is also known as the fuel system pressure control device that reacts to the changes of cylinder pressure and controls the amount of fuel that can be delivered by the injection pump.

Feature to Benefit

  • It’s an innovative product designed with high performance and quality.
  • Available in different sizes and specifications.
  • The new YCT O2 sensor is the best choice for your vehicle.
  • The YCT Oxygen O2 Sensor Upstream Downstream Fits For Toyota Tacoma 4Runner Pickup Tundra Sequoia is designed to work in your vehicle.
  • It is manufactured from high quality materials for long lasting durability and reliability.
  • This product has passed all of the required tests and inspection to meet industry standards and regulations.

How to Choose The Best Oxygen Sensor?

The oxygen sensor is a key part to determine the fuel mixture of combustion in an internal combustion engine, which also directly affects the power and economy of the car. We at Car Sensor always think that we should do our best effort to help users select suitable products for their car, and hope to provide useful information here:

Consider Sensor locations

There are mainly two types: one is the front location, and another is the rear location. The car models whose engine is located in front usually have more than one oxygen sensor on the air tube, while the models with rear-mount engines only have one. Some models even only have one oxygen sensor on the exhaust manifold or catalytic converter, making the replacement of oxygen sensors more difficult for car owners.

Consider Number of sensors

Usually, most cars contain four oxygen sensors (two front and two rear), with some high-end models having five or six sensors to monitor the air/fuel mixture.

Consider Types of oxygen sensors

The four types of oxygen sensors are zirconia, yttria stabilized zirconia (YSZ), ultra-high purity (UHP), and platinized cerium oxide (Pt/CeO2). YSZ is used on most Japanese models. UHP was used on BMW M1 models and is still used on some of their vehicles today. The most widely-used type is the zirconia sensor. Most of our Oxygen Sensors are made of this material for its best durability and performance.

Why do Oxygen Sensors go bad

Oxygen sensors go bad in a number of different ways. If they are not operating correctly when the vehicle is started, then a check engine light may illuminate on your dash. This may be due to a bad connection, broken wire, or faulty sensor itself. Sensors will also fail if contaminated with oil or coolant fluid which can keep them from achieving the proper temperature to determine the amount of oxygen present. A bad oxygen sensor can also affect your gas mileage and cause engine performance issues.

How do oxygen sensors go bad?

When the vehicle is started, the computer reads from the oxygen sensor to determine how much-unburned oxygen is present in your exhaust. The more oxygen detected by the sensor, the lower the amount of fuel injected into your cylinders. If you have a faulty oxygen sensor, the leaner the air-to-fuel mixture.

The computer will adjust accordingly to keep the mixture at 14.7:1 which is ideal for maximum fuel efficiency and minimal emissions. Oxygen sensors that are exposed to extreme heat will emit a higher voltage because of their high operating temperature. If oil or coolant gets into one of the sensor’s ceramic bodies, then the sensor will be poisoned and not be able to determine the proper amount of oxygen present. This can cause major drivability issues as well as damage to internal engine components.

How do you know if an oxygen sensor is bad?

If your check engine light is on, it is best to have a certified mechanic with the proper diagnostic tools to inspect your vehicle’s oxygen sensors for problems.

How long does it take for an oxygen sensor to go bad?

On average, it takes between 45,000 and 80,000 miles before a faulty or failing oxygen sensor starts emitting trouble codes.

How do You Fix an Oxygen Sensor?

Once a bad or faulty oxygen sensor has been identified, it will need to be replaced. If contaminated oil or coolant fluid is the issue, then this may require replacing the catalytic converter as well. In some cases, if the sensor is still emitting a signal but the voltage is not within the range that allows your engine to run safely, then it can be adjusted or recalibrated.

How to Replace an Oxygen Sensor?

1. You will need these tools:

  • 5/8 deep-well socket
  • Breaker bar
  • Ratchet
  • 10mm, 17mm sockets (2)
  • Torque wrench

1. Make sure the car is turned off and cool. Open the hood and detach the negative terminal on your battery using the 10mm socket.

2. Remove the air intake assembly to expose the oxygen sensor. There are three 8mm nuts that need to be removed before you can remove the intake tube. Use your 17mm socket for this step.

3. Once nuts are removed, pull out a rubber hose that is attached to the mass airflow sensor underneath the car. Detach mass airflow sensor connector. Use your 17mm socket for this step.

4. Remove the oxygen sensor by using the 17mm wrench to loosen the nut while holding down on the sensor itself with a 10mm wrench. Do not completely remove the nut, just break it free so you can unscrew the oxygen sensor out of its bracket.

5. Once this step is completed, you can now remove the oxygen sensor from its bracket and replace it with a new one. Do not forget to apply some dielectric grease on your new sensor before installation.

6. Insert a new oxygen sensor and tighten the nut down while holding on to the oxygen sensor itself using 10mm wrench until it’s snug. Do not over-tighten as this will damage the sensor. 8. Re-attach mass airflow sensor and re-attach air intake tube back to air filter box and oxygen sensor (tighten down the 3 nuts with your 10mm socket and ratchet). 9. Reconnect the negative terminal on the battery and close the hood.

what to do After Replacing Oxygen Sensor?

This step is optional, but if you want to reset your computer system after replacing the oxygen sensor, go to the next step “how to initialize a new oxygen sensor in a car.” Otherwise, skip this step and continue on with “how to drive and accelerate after replacing an oxygen engine oxygen sensor”.

2. Initializing a new oxygen sensor in a car:

1. You need to use your diagnostic machine and turn off the CEL (check engine light).

2. Start your car and let it run for at least 1 minute.

3. If there is no check engine light or cel, then you can proceed with driving and accelerating after replacing an oxygen sensor. If the cel remains on, check your work and make sure you didn’t miss anything.

 How to Drive and Accelerate After Replacing an Oxygen Sensor:

1. Drive nice and easy for the first 100 miles or so (use cruise control when possible). This will allow the computer to learn its new fuel trim settings based on your driving habits.

 2. After about 100 miles, you can begin accelerating normally and drive as you normally would.

3. If the cel (check engine light) comes on at any point during your trip, immediately reduce your speed (use cruise control when possible) and try to determine which pedal position is causing the cel/light to appear:

How to Check if Your Oxygen Sensors Are Working?

1. Insert the probe of an obd2 scanner into the car’s obd2 port below the steering wheel.

2. Start your car and let it idle until it reaches normal operating temperature (the temp gauge is in the middle or slightly past halfway).

3. Put on your seat belt,. Make sure the parking brake is set and begin accelerating from a complete stop while watching the check engine light on your dash. If the light does not turn on, then your new oxygen sensor(s) are working and you didn’t miss anything during installation.

4. Keep in mind that some car models require an obd2 scanner to read which pedal position is causing the cel/light to appear. If you don’t have immediate access to an obd2 scanner, try your best to take your car in when your gas cap light comes on. This means it’s time for an emissions check and they will scan your car for free! It’s always nice when someone else does the dirty work for you.

5. If you’re still unsure about whether or not your oxygen sensors are working, drive the car in a city with an obd2 scanner for about 10 minutes and have them scan it to check for any emission problems.

Car repair manuals do not recommend servicing the oxygen sensor unless they failed. Some damage can be caused to the oxygen sensor if it is serviced improperly.

Car repair manuals are not normally written with the average DIYer in mind so they can be difficult to follow. Several people have reportedly damaged their car’s engine by servicing the oxygen sensor because of a lack of proper knowledge about how to do it correctly. One reputable source suggests that you should have a professional replace oxygen sensors to avoid engine damage.


There are many types of oxygen monitors available in the market today. But, they all vary in their features and specifications. However, there are some features that they all have in common. These include their accuracy, durability, size, and price. This is why you need to find the best oxygen monitor for your needs before purchasing one.

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