Walker 250-54068 Oxygen Sensor - Upstream

Walker OE Oxygen Sensor for Subaru Legacy

Walker Products OE 250-54068 is a heated oxygen sensor built for specific vehicle applications and exact mounting positions. It is engineered as an OE-style replacement for 2010-2012 Subaru Legacy upstream service, including Bank 1 Sensor 1 coverage where listed.

The Walker Products OE line focuses on application-specific engine management sensors that match the required fitment position and provide the ECU with the feedback it expects. For Subaru Legacy upstream oxygen sensor replacement, 250-54068 is a direct-fit option for the listed model years.

Key Features

• Part number: 250-54068
• Walker Products OE product line
• Heated oxygen sensor design
• Specific fit for the listed Subaru Legacy applications
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 21.18
• Overall length: 24.72

Detailed Description

Walker Products 250-54068 is an upstream oxygen sensor for 2010-2012 Subaru Legacy models. It is designed for the front oxygen sensor location and the Bank 1 Sensor 1 position noted in the fitment data. As a heated sensor, it helps the engine control system monitor exhaust oxygen content during warm-up and normal operation.

Walker Products OE sensors are built for specific applications, fitment positions, and ECU feedback requirements. If your Subaru Legacy has a stored fault code, poor fuel economy, elevated emissions, or an illuminated malfunction indicator light tied to the upstream oxygen sensor circuit, this part number is the direct replacement to verify against your vehicle by year, model, and position. The 250-54068 part number is also useful when searching for a Subaru Legacy upstream oxygen sensor replacement or a Walker Products OE 250-54068 direct-fit sensor.

What It Helps Address

• Check engine light related to the upstream oxygen sensor
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation linked to sensor signal issues
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for Bank 1 Sensor 1

Installation Notes and Tips

Confirm the connector shape, wire count, thread diameter, and mounting 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 signal quality. Verify that your vehicle is a 2010, 2011, or 2012 Subaru Legacy with the upstream oxygen sensor application listed for this part number. This part cross-references no additional part numbers in the provided data.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are developed as OE replacement parts for worldwide vehicle applications. The company is ISO 9001/TS 16949 certified and has supplied engine management and fuel system components since 1946.