OE Quality
60-Day Returns

Spectra OS6139 Oxygen Sensor - Upstream
Reliable Oxygen Sensor for Saab 9-2X and Subaru Impreza
The Spectra OS6139 oxygen sensor is designed to provide accurate emissions monitoring for your Saab 9-2X or Subaru Impreza. This sensor helps maintain optimal engine performance and ensures compliance with emission standards.
Key Features of Spectra OS6139 Oxygen Sensor
- Compatible with Saab 9-2X and Subaru Impreza models
- Precise oxygen level detection for efficient fuel management
- Durable construction for long-lasting performance
- Direct replacement part number OS6139 for easy identification
- Supports emission control system functionality
Detailed Product Description
The Spectra OS6139 oxygen sensor is engineered to monitor the oxygen content in the exhaust gases of Saab 9-2X and Subaru Impreza vehicles. By providing real-time data to the engine control unit (ECU), it helps optimize the air-fuel mixture for improved combustion efficiency and reduced emissions. This sensor is a critical component in the emission control system, ensuring your vehicle meets environmental regulations while maintaining smooth engine operation. The OS6139 part number corresponds to a direct fit sensor designed specifically for these models, simplifying replacement and ensuring compatibility.
Common Applications and Issues Addressed
- Helps resolve rough idling and engine hesitation
- Reduces increased fuel consumption caused by faulty sensors
- Prevents check engine light triggers related to oxygen sensor faults
- Supports emission system compliance and reduces exhaust pollutants
- Improves overall engine performance and responsiveness
Installation Notes and Tips
When installing the Spectra OS6139 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Locate the existing oxygen sensor on the exhaust manifold or pipe, disconnect the electrical connector, and remove the old sensor using an appropriate oxygen sensor socket. Install the new sensor by threading it in carefully to avoid cross-threading, then reconnect the electrical plug. After installation, it is recommended to clear any diagnostic trouble codes with a scan tool to reset the ECU.
Quality Assurance and Warranty
Spectra manufactures the OS6139 oxygen sensor to meet OEM specifications for fit and function. While specific warranty details are not provided, Spectra products typically undergo rigorous quality control to ensure reliability and durability in emission control applications.
This part fits 5 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2005 | Saab | 9-2X | 2.0L | H4 | Upstream | w/ 4 Wires |
| 2005 | Subaru | Impreza | 2.0L | H4 | Upstream | w/ 4 Wires |
| 2004 | Subaru | Impreza | 2.0L | H4 | Upstream | w/ 4 Wires |
| 2003 | Subaru | Impreza | 2.0L | H4 | Upstream | w/ 4 Wires |
| 2002 | Subaru | Impreza | 2.0L | H4 | Upstream | 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.