Walker 250-54061 Oxygen Sensor - Upstream

Walker Products OE Oxygen Sensor for Subaru and Saab

Walker Products OE Part Number 250-54061 is a heated oxygen sensor built for specific upstream applications. It is engineered as an OE-style replacement for vehicles that need accurate ECU feedback from the exhaust stream, including 2005 Subaru Forester, 2005 Subaru Impreza, 2005 Subaru Legacy, 2005 Subaru Outback, and 2005 Saab 9-2X.

Key Features

• Heated oxygen sensor for upstream engine management feedback
• Specific fit design for the listed vehicle applications
• 4-wire configuration with female radiused polygon connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 16.26; overall length: 19.8
• Wire gauge measurement: 20
• Walker Products OE line for application-specific replacement fitment

Product Details

Walker Products OE 250-54061 is intended for upstream oxygen sensor locations where the ECU relies on precise exhaust-gas feedback to manage fuel delivery and emissions control. The heated sensor design helps the system reach operating temperature faster, which supports stable signal output during normal driving conditions. This part number is matched to specific fitment positions and connector requirements, making it a direct replacement choice for 2005 Subaru Forester, 2005 Subaru Impreza, 2005 Subaru Legacy, 2005 Subaru Outback, and 2005 Saab 9-2X applications.

Walker Products OE focuses on application-specific engine management components, and this oxygen sensor follows that approach with the correct connector style, wire count, and threaded mounting configuration for the listed vehicles. Part number 250-54061 is also referenced as Walker Products OE 250-54061 in catalog listings.

What It Can Help Address

• Check engine light related to upstream oxygen sensor performance
• Poor fuel economy caused by inaccurate air-fuel feedback
• Rough engine operation from incorrect ECU sensor input
• Elevated exhaust emissions from a failing oxygen sensor
• Fault codes stored in the ECU for oxygen sensor circuits or related systems

Installation Notes

Confirm the vehicle’s emissions configuration and sensor position before ordering, especially on 2005 Subaru Legacy and 2005 Subaru Outback applications where California and non-California notes differ. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. Verify the threaded bung and connector orientation match the original part, and clear diagnostic trouble codes after replacement if required by the repair procedure.

Quality Assurance

Walker Products manufactures engine management and oxygen/air-fuel sensors as OE replacement parts for global vehicle applications. The company is ISO 9001/TS 16949 certified and has supplied engine management components since 1946, supporting consistent application-specific fitment and diagnostic feedback.

Fitment

• Fits 2005 Saab 9-2X, upstream.
• Fits 2005 Subaru Forester, upstream.
• Fits 2005 Subaru Impreza, upstream.
• Fits 2005 Subaru Legacy, upstream.
• Fits 2005 Subaru Outback, upstream.