HomeEmission Control > SensorsSpectra OS5308 Oxygen Sensor - Upstream
Part #: OS5308

Spectra OS5308 Oxygen Sensor - Upstream

Upstream
⚙️ 8 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Subaru, Impreza, Legacy, and Outback
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Reliable Oxygen Sensor for Subaru Impreza, Legacy, and Outback

The Spectra OS5308 oxygen sensor is designed to provide accurate emissions monitoring for select Subaru models. This sensor helps maintain optimal engine performance and ensures compliance with emission standards for the Impreza, Legacy, and Outback.

Key Features of Spectra OS5308 Oxygen Sensor

  • Compatible with Subaru Impreza, Legacy, and Outback models
  • Precise oxygen level detection for efficient fuel management
  • Durable construction for long-lasting performance
  • Direct replacement part number OS5308 for easy fitment
  • Supports emission control system functionality

Detailed Product Description

The Spectra OS5308 oxygen sensor is engineered to monitor the oxygen content in the exhaust gases of Subaru vehicles, including the Impreza, Legacy, and Outback. By accurately measuring oxygen levels, this sensor enables the engine control unit to adjust the air-fuel mixture for improved combustion efficiency and reduced emissions. The OS5308 is manufactured to meet OEM specifications, ensuring reliable operation and compatibility with the vehicle’s emission control system. This oxygen sensor is a critical component for maintaining engine performance and meeting environmental regulations.

Common Applications and Issues Addressed

  • Helps resolve poor fuel economy caused by incorrect air-fuel mixture
  • Reduces engine hesitation and rough idling related to faulty oxygen sensors
  • Prevents increased emissions and failed emissions tests
  • Addresses check engine light triggers related to oxygen sensor faults
  • Supports smooth engine operation and optimal exhaust performance

Installation Notes and Tips

When replacing the oxygen sensor on Subaru Impreza, Legacy, or Outback models, ensure the engine is cool before starting installation. Use appropriate tools to avoid damaging the sensor or wiring harness. It is recommended to compare the new sensor with the original part number OS5308 to confirm compatibility. Proper torque specifications should be followed to prevent leaks or sensor damage.

Quality Assurance and Warranty Information

Spectra oxygen sensors are manufactured to meet industry standards for durability and performance. The OS5308 part undergoes quality control testing to ensure reliable operation within Subaru emission systems. Warranty coverage details should be confirmed with the product documentation or supplier.

This part fits 8 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersPositionNotes
2001SubaruImpreza2.2LH4Upstreamw/ 4 Wires
2001SubaruLegacyManual2.5LH4Upstreamw/ 4 Wires
2001SubaruOutbackManual2.5LH4Upstreamw/ 4 Wires
2000SubaruImpreza2.2LH4Upstreamw/ 4 Wires
2000SubaruLegacyManual2.5LH4Upstreamw/ 4 Wires
2000SubaruOutbackManual2.5LH4Upstreamw/ 4 Wires
1999SubaruImpreza2.2LH4Upstreamw/ California Emissions; w/ 4 Wires
1999SubaruLegacy2.2LH4Upstreamw/ California Emissions; w/ 4 Wires

* 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:

1355715015213285422641AA00022641AA00A2349018246675S3922753361753418ES10938SG1716SG1716TSU5240

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