OE Quality
60-Day Returns

Spectra OS6147 Oxygen Sensor - Upstream
Reliable Oxygen Sensor for Subaru Legacy Vehicles
The Spectra OS6147 oxygen sensor is designed specifically for Subaru Legacy models, ensuring accurate emission control and optimal engine performance. This sensor helps maintain proper air-fuel mixture by monitoring exhaust gases and providing real-time data to the engine control unit.
- Compatible with Subaru Legacy models
- Part number OS6147 for precise identification
- Designed to monitor oxygen levels in exhaust gases
- Supports emission control system efficiency
- Durable construction for long-term use
Product Overview and Functionality
The Spectra OS6147 oxygen sensor plays a critical role in the emission control system of Subaru Legacy vehicles. By measuring the oxygen content in the exhaust stream, it allows the engine control unit to adjust the air-fuel ratio for optimal combustion. This adjustment helps reduce harmful emissions and improves fuel economy. The sensor is engineered to meet OEM specifications, providing reliable performance and compatibility with the vehicle’s existing systems.
Common Applications and Problem Resolution
- Helps resolve rough idling and engine hesitation
- Addresses increased fuel consumption issues
- Reduces exhaust emissions to meet regulatory standards
- Prevents check engine light activation related to oxygen sensor faults
- Improves overall engine responsiveness and efficiency
Installation Notes and Tips
- Ensure vehicle compatibility with Subaru Legacy models before installation
- Use proper tools to avoid damage to the sensor or exhaust components
- Disconnect the battery before replacing the sensor to prevent electrical issues
- Check for exhaust leaks that may affect sensor readings
- Follow torque specifications to secure the sensor correctly
Quality Assurance and Warranty Information
The Spectra OS6147 oxygen sensor is manufactured to meet industry standards for durability and performance. It undergoes rigorous testing to ensure accurate readings and long service life. This part is backed by a limited warranty, providing confidence in its reliability when installed in compatible Subaru Legacy vehicles.
This part fits 3 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2012 | Subaru | Legacy | 2.5L | H4 | Upstream | Bank 1 Sensor 1; w/ 4 Wires |
| 2011 | Subaru | Legacy | 2.5L | H4 | Upstream | Bank 1 Sensor 1; w/ 4 Wires |
| 2010 | Subaru | Legacy | 2.5L | H4 | Upstream | Bank 1 Sensor 1; 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.