Best Oxygen Sensor Relays of 2025
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Oxygen sensor relays are electronic components that play a crucial role in the proper functioning of vehicles. These relays are responsible for monitoring the oxygen levels in the exhaust gases and sending this information to the engine's computer. This data is then used to adjust the air-to-fuel ratio, ensuring that the engine runs efficiently and emits fewer pollutants. Oxygen sensor relays are designed to be durable and reliable, and they are available in a variety of designs to fit different types of vehicles. With their critical role in emissions control, oxygen sensor relays are an essential component for any modern vehicle.
At a Glance: Our Top Picks
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Top 9 Oxygen Sensor Relays
Mechanics Choice Oxygen Sensor Relay for BMW and Land Rover
The Mechanics Choice Oxygen Relay is designed specifically for BMW and Land Rover models from 1985 to 2010. It features a light green color and serves as an accessory power relay. This product is crafted with modern tooling, ensuring high quality and reliability. You can trust that this relay is made with durable materials, often surpassing the original equipment manufacturer's standards. Plus, it installs easily, providing a seamless fit just like the factory unit. Each relay is also rigorously tested to guarantee optimal performance, giving you peace of mind on the road.
Bosch OEM Oxygen Sensor for BMW
The Bosch OEM Oxygen Sensor # 0258003477 / 13477 is a 100% new and genuine sensor that fits BMW models with a new O2 PreCat and 320mm 4 wire. This sensor comes with Bosch numbers 0258003477 / 13477 and BMW numbers 11781433075 / 11781742050. It is an OEM product, ensuring quality and reliability.
Bosch Oxygen Sensor - 16276
The Bosch 0258006276 - 16276 Oxygen Sensor is an OEM quality product from the Mercedes Bosch Germany brand, suitable for Catalytic Converters & Parts and Exhaust & Emissions. This oxygen sensor is useful for detecting the oxygen levels in the exhaust system and providing the information to the engine management system, helping you to achieve accurate fuel delivery and emission control. The product is designed with the highest standard of quality and reliability for long-lasting performance.
Flowtech Oxygen Sensor O2 Bung
This oxygen sensor relay by Flowtech is a weld-in sensor only, made in the USA. It is categorized as an oxygen sensor relay.
Spectra Premium OS5365 Sensor
The Spectra Oxygen Sensor is designed with user convenience in mind. It features packaging in three languages and a part number engraved directly on the sensor, making identification easy. The connectors are fully waterproof and can withstand various weather conditions, ensuring reliability during car washes or rainy days. Continuous quality testing during manufacturing guarantees that you receive a high-performing product. Additionally, it provides an exact electrical connector match to your vehicle’s harness, simplifying the installation process and enhancing compatibility.
ZTBH Oxygen Sensor F85Z-9G444-BA
The ZTBH Oxygen Sensor is designed as a direct replacement for your vehicle, ensuring a perfect fit and easy installation. With its four-wire linear configuration, it offers reliable performance for accurate readings. This sensor is built to last, providing durability that translates to a longer service life, which means fewer replacements and less hassle for you. The sensor's resolution ensures that your vehicle runs efficiently, helping to improve fuel economy and reduce emissions. If you have any questions or need assistance, customer support is available 24/7 to help you.
MBEYKTDV Oxygen Sensor A0009058011
The MBEYKTDV Oxygen Sensor is designed to enhance your Benz car's performance. This precision-engineered sensor helps improve fuel efficiency, allowing you to save on fuel costs. Its durable construction ensures a perfect fit, directly replacing the original NOX sensor without any hassle. By addressing check engine light issues, it helps you avoid unnecessary repairs and keeps your vehicle running smoothly. Ultimately, this sensor not only aids in reducing fuel consumption but also ensures your car operates at its best.
UJEHKUQ Water Temperature Sensor 803 Series
The UJEHKUQ Temperature Sensor is designed to enhance your monitoring of water conditions. With its advanced oxygen sensing capability, you can ensure optimal aquatic environments. This sensor also measures water temperature, providing real-time data that helps you maintain ideal conditions for your needs. Whether you’re managing a fish tank or overseeing industrial processes, this tool offers convenience and accuracy. Its compatibility with various model numbers, including 803/1/25 and 803/1/30, makes it a versatile choice for users seeking reliable performance.
BKWJNYEHI ABS Wheel Speed Sensor
The BKWJNYEHI Wheel Speed Sensor is designed to enhance your vehicle's performance. This product features automotive oxygen sensor relays, which help regulate the engine's air-fuel mixture for better efficiency. Additionally, it includes linear sensors that provide accurate speed readings, ensuring your vehicle operates smoothly. With this sensor, you can expect improved braking response and enhanced safety on the road. This means less worry for you as a driver, knowing your vehicle is equipped to handle various driving conditions effectively.
Frequently Asked Questions (FAQs)
1. Is there a relay for O2 sensor?
Yes, the O2 sensor's heater circuit is often controlled by a relay. If the O2 sensor heater circuit's negative wire goes directly to ground, a short-to-power problem may be present. In such cases, the heater circuit is usually controlled by a relay.
2. What are the common causes of O2 sensor failure?
Oxygen sensor failure can be caused by age and high mileage, internal contaminants (poisoning), or electrical issues. It is recommended to inspect or replace one or two wire unheated oxygen sensors every 30,000 miles to prevent failure.
3. What happens when an oxygen sensor goes bad?
A bad oxygen sensor can cause rough idle, loss of engine power, poor acceleration, engine misfires, and even stalling. It disrupts essential engine functions like timing, combustion intervals, and air-fuel ratio.
4. What module controls the O2 sensor?
The engine computer, also known as the Powertrain Control Module (PCM), controls the O2 sensor. It uses the input from the upstream O2 sensor(s) to readjust the fuel mixture for optimum emissions, fuel economy, and performance.
5. Can I drive with a failing O2 sensor?
It is not recommended to drive with a bad oxygen sensor. A failing sensor can cause the powertrain to run on an incorrect fuel mixture, potentially leading to issues like clogged catalytic converters.
6. What can kill an oxygen sensor?
Oxygen sensors can fail due to exposure to certain types of silicone compounds, oil fouling from an oil-burning engine, or the presence of tetra-ethyl lead in gasoline.
7. What are the symptoms of a malfunctioning oxygen sensor?
Symptoms of a malfunctioning oxygen sensor include a check engine light, noticeable loss of fuel efficiency, sulfur or 'rotten egg' smell from the exhaust, black smoke from the exhaust, high emission levels, and engine hesitation, skipping, bucking, or power surges.
During our oxygen sensor relay research, we found 24 oxygen sensor relay products and shortlisted 9 quality products. We collected and analyzed 3,099 customer reviews through our big data system to write the oxygen sensor relays list. We found that most customers choose oxygen sensor relays with an average price of $63.36.
The oxygen sensor relays are available for purchase. We have researched hundreds of brands and picked the top brands of oxygen sensor relays, including Sawyer Auto, Bosch, Flowtech, Spectra Premium, ZTBH. The seller of top 1 product has received honest feedback from 831 consumers with an average rating of 4.5.
Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.