12737721 GM Sensor

Review GM Genuine Sensor

The GM 12737721 sensor is a critical automotive component designed for use in various emissions control systems. This sensor plays a crucial role in ensuring that the vehicle complies with stringent emission regulations.

This sensor is a heated oxygen sensor, which is specifically designed to measure the amount of unburnt oxygen present in the exhaust gases of a gasoline engine. By accurately measuring the oxygen content in the exhaust stream, the sensor helps the engine management system optimize the fuel-air mixture for efficient combustion. This, in turn, reduces the amount of harmful emissions produced by the vehicle.

The GM 12737721 sensor is a three-wire sensor, which means it has three electrical terminals: heating, ground, and signal. The heating element is used to bring the sensor up to operating temperature quickly, which is essential for accurate readings. The ground terminal is used to provide a reference voltage to the sensor, while the signal terminal outputs the voltage proportional to the oxygen concentration in the exhaust gases.

The sensor housing is made of high-temperature ceramic material, which ensures that it can withstand the extreme temperatures encountered in the exhaust system. The sensor element is made of zirconia, which is known for its excellent oxygen sensing properties.

The GM 12737721 sensor is designed to last for a long time, but it can fail due to various reasons, such as physical damage, contamination, or age. When the sensor fails, it can cause check engine lights to illuminate and may result in reduced fuel efficiency or increased emissions.

To replace the sensor, it is essential to follow the manufacturer's instructions carefully. The process typically involves removing the exhaust system components around the sensor location, disconnecting the electrical connectors, and replacing the old sensor with a new one. It is also important to use the appropriate tools and safety equipment during the replacement process.

In summary, the GM 12737721 sensor is a vital automotive component that plays a crucial role in ensuring that vehicles comply with emission regulations. It measures the oxygen content in exhaust gases and helps optimize the fuel-air mixture for efficient combustion. The sensor is a heated three-wire oxygen sensor with a ceramic housing and a zirconia sensor element. It is designed to last for a long time but can fail due to various reasons. Replacing the sensor requires following the manufacturer's instructions carefully and using appropriate tools and safety equipment.

The GM 12737721 sensor is a crucial component in the fuel delivery system of various General Motors vehicles. This sensor monitors the position of the throttle body and sends this information to the engine control module (ECM). Based on this data, the ECM optimizes fuel delivery and engine performance. Let's discuss some pros and cons of purchasing this sensor.

1. Improved Fuel Efficiency: A faulty or failing throttle position sensor can result in poor fuel economy. Replacing the sensor ensures accurate data is sent to the ECM, which can lead to improved fuel efficiency.

2. Enhanced Engine Performance: A malfunctioning sensor can adversely affect engine performance. Replacing it with a new one can help restore optimal engine performance.

3. Check Engine Light: If the check engine light is on, a faulty throttle position sensor could be the culprit. Replacing the sensor can help turn off the light, providing peace of mind.

4. Preventing Further Damage: A failing sensor can lead to more significant issues if left unaddressed. Replacing it early can save money in potential repair costs down the line.

1. Cost: The cost of replacing a throttle position sensor can vary depending on the vehicle and the aftermarket or OEM part chosen. It may be a significant investment for some.

2. Installation Complexity: The installation process for a throttle position sensor can be complicated, especially for those without extensive automotive experience. It may require specialized tools and a thorough understanding of the vehicle's fuel delivery system.

3. Potential for Errors: Installing the sensor incorrectly can lead to persistent issues or even damage to the vehicle. It is crucial to follow the installation instructions carefully and accurately.

In conclusion, the decision to purchase a GM 12737721 sensor depends on the specific circumstances. If your vehicle's check engine light is on, or if you're experiencing poor fuel economy or engine performance, replacing the sensor could be worth the investment. However, it's essential to consider the cost, installation complexity, and potential for errors before making the purchase. If you're unsure about the installation process, it may be best to consult a professional mechanic for assistance. Ultimately, addressing a faulty throttle position sensor can help restore optimal engine performance and improve your vehicle's overall reliability.

Details:

Just didn't like it. Changed my mind. Found a better price. 4.2l twin-turbo.

specifications ignitioncomp:

• brand: Gm
• mpn: 12737721
• part type: Sensor
• genuine oem: Yes
• manufacturer warranty: 1 Year
• universal fitment: Direct Replacement
• make: Buick
• year: 2019 2020 2021 2022 2023 2024 2025
• parts included: Only Part Reference 5 On The Diagram Is Included
• replaces part number: 55494828

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• policy: returns accepted
• time: 30 days
• paid by: seller

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• category: Auto Parts > Car Truck Accessories > Ignition Systems Components

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• sold #: 9
• started: april 3, 2026
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• options: ship-to-home
• prices: $4.66–$15.86
• item condition: New
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