HomeEmission Control > SensorsSpectra OS5201 Oxygen Sensor - Downstream, Downstream Left or Downstream Right
Part #: OS5201

Spectra OS5201 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Downstream
21 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Buick, Chevrolet, GMC, and Isuzu, Lucerne, Rainier, SSR, Trailblazer EXT, Envoy XL, Envoy XUV, and Ascender
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Reliable Oxygen Sensor for Buick, Chevrolet, GMC, and Isuzu Vehicles

The Spectra OS5201 oxygen sensor is designed to provide accurate emissions monitoring for select Buick, Chevrolet, GMC, and Isuzu models. This sensor helps maintain optimal engine performance and emissions control by delivering precise oxygen level readings to the vehicle's engine control unit.

  • Compatible with Buick Lucerne and Chevrolet SSR
  • Fits GMC Envoy XL, Envoy XUV, Rainier, and Trailblazer EXT
  • Also compatible with Isuzu Ascender
  • Part number OS5201 ensures exact replacement fit
  • Designed for emission control sensor applications

Product Details and Compatibility

The Spectra OS5201 oxygen sensor is engineered to meet the specifications required for emission control systems in various GM and Isuzu vehicles. It is compatible with models such as the Buick Lucerne, Chevrolet SSR, GMC Envoy XL, Envoy XUV, Rainier, Trailblazer EXT, and the Isuzu Ascender. This sensor plays a critical role in monitoring the oxygen content in the exhaust gases, allowing the engine control module to adjust fuel injection and maintain efficient combustion.

Common Applications and Issues Addressed

  • Helps reduce vehicle emissions by providing accurate oxygen level data
  • Prevents engine performance issues related to incorrect air-fuel mixture
  • Addresses check engine light triggers related to oxygen sensor faults
  • Improves fuel economy by enabling precise fuel management
  • Supports smooth engine idling and acceleration

Installation Notes and Tips

When installing the Spectra OS5201 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use an oxygen sensor socket for removal and installation to prevent damage. Verify the sensor connector matches the vehicle harness before installation. It is recommended to check for any exhaust leaks and clean the sensor mounting area prior to installation for optimal performance.

Quality Assurance and Warranty

Manufactured by Spectra, the OS5201 oxygen sensor adheres to industry standards for emission control components. While specific warranty details are not provided, Spectra products typically undergo rigorous testing to ensure durability and reliable operation within the specified vehicle applications.

This part fits 21 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2008BuickLucerne3.8LV6DownstreamCompatible with Bank 1 Sensor 2 Oxygen Sensor.
2004BuickRainier5.3LV8Downstream Right
2004BuickRainier5.3LV8Downstream Left
2004ChevroletSSR5.3LV8Downstream Right
2004ChevroletSSR5.3LV8Downstream Left
2004ChevroletTrailblazer EXT5.3LV8Downstream Right
2004ChevroletTrailblazer EXT5.3LV8Downstream Left
2004GMCEnvoy XL5.3LV8Downstream Right
2004GMCEnvoy XL5.3LV8Downstream Left
2004GMCEnvoy XUV5.3LV8Downstream Right
2004GMCEnvoy XUV5.3LV8Downstream Left
2004IsuzuAscender5.3LV8Downstream Right
2004IsuzuAscender5.3LV8Downstream Left
2003ChevroletSSR5.3LV8Downstream Right
2003ChevroletSSR5.3LV8Downstream Left
2003ChevroletTrailblazer EXT5.3LV8Downstream Right
2003ChevroletTrailblazer EXT5.3LV8Downstream Left
2003GMCEnvoy XL5.3LV8Downstream Right
2003GMCEnvoy XL5.3LV8Downstream Left
2003IsuzuAscender5.3LV8Downstream Right
2003IsuzuAscender5.3LV8Downstream Left

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

125671631528021048213152823446475S44087525357540638125671630ES20094ES20320OS1473SG720SG720TSU1523

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.