Walker 250-54067 Oxygen Sensor - Upstream

Walker OE Oxygen Sensor for Subaru Legacy and Outback

Walker Products OE Part Number 250-54067 is a heated oxygen sensor built for specific vehicle applications and upstream mounting positions. It is engineered as an OE-style replacement for Subaru Legacy and Subaru Outback models, with fitment matched to the vehicle’s diagnostic feedback requirements.

Key Features

• Heated oxygen sensor with specific fitment for targeted applications
• Upstream mounting position for Bank 1 Sensor 1 service needs
• Threaded mount with 18.0 mm thread diameter
• 4-wire design with 20-gauge wiring
• Radiused polygon female connector for application-specific connection
• Wiring harness length: 17.24 in.; overall length: 20.79 in.

Product Details

Walker Products OE 250-54067 is designed for 2010-2012 Subaru Legacy and 2010-2012 Subaru Outback upstream oxygen sensor replacement. This sensor is intended for vehicles that require a front oxygen sensor in the Bank 1 Sensor 1 position, helping the ECU receive the correct exhaust feedback for fuel control and emissions monitoring. Walker Products OE focuses on application-specific sensor design, so the connector, harness length, and threaded mounting style are matched to the listed vehicle applications.

The Walker Products OE line is built around original-equipment-style replacement parts for engine management and emissions systems. For Subaru Legacy and Subaru Outback owners searching for an upstream oxygen sensor, Walker Products OE 250-54067 provides a direct-fit solution for the listed model years and positions.

What This Oxygen Sensor Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate exhaust readings
• Elevated exhaust emissions from a failing sensor
• Stored ECU fault codes tied to Bank 1 Sensor 1 or front sensor circuits

Installation Notes and Tips

Verify the connector shape, wire count, thread diameter, and upstream position before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life and affect ECU feedback. Confirm the vehicle is a 2010-2012 Subaru Legacy or 2010-2012 Subaru Outback with an upstream oxygen sensor requirement before ordering.

Fits 2010-2012 Subaru Legacy, upstream. Fits 2010-2012 Subaru Outback, upstream. This part cross-references OE-style oxygen sensor applications for the same vehicle positions.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures sensors to application-specific OE replacement standards. The company is ISO 9001/TS 16949 certified, with manufacturing focused on fitment accuracy and diagnostic system feedback for modern ECU-controlled vehicles.