Walker 250-54086 Oxygen Sensor - Upstream or Upstream Right

Walker OE Oxygen Sensor for Subaru and Toyota

Walker Products OE 250-54086 is a heated oxygen sensor built for specific vehicle applications and exact mounting positions. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring on select Subaru Legacy, Subaru Outback, and Toyota Sienna models.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit design for the listed application and position
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for vehicle-specific connection
• Wiring harness length: 6.42
• Overall length: 9.96

Product Details

Walker Products OE 250-54086 is part of the Walker Products OE line, which focuses on original-equipment-style replacement sensors for engine management systems. This oxygen sensor is designed for upstream placement and is listed for 2020 Subaru Legacy and 2020 Subaru Outback upstream applications, plus 2015-2019 Subaru Legacy and Subaru Outback upstream right positions. It also fits 2011-2012 Toyota Sienna upstream applications. For shoppers searching for an upstream oxygen sensor for a 2020 Subaru Legacy, an upstream right oxygen sensor for a 2015-2019 Subaru Outback, or a replacement oxygen sensor for a 2011-2012 Toyota Sienna, part number 250-54086 provides a direct-fit option matched to the specified vehicle and sensor location.

Walker Products has supplied engine management components since 1946 and manufactures sensors to support the diagnostic feedback expected by the ECU. This part cross-references no listed aftermarket part numbers in the provided data.

Common Symptoms This Sensor May Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate sensor readings
• Higher exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Confirm the vehicle position before installation, since this sensor is application-specific and listed for upstream and upstream right locations only. Inspect the sensor wiring harness and connector for damage before replacement, and verify the threaded mounting point is clean and undamaged. Because oxygen sensor faults can also involve related wiring or connector issues, check the full circuit during diagnosis.

Quality Assurance

Walker Products OE sensors are manufactured under Automotive ISO9001/TS 16949 quality systems and developed as OE-style replacements for specific vehicle applications. The 250-54086 is built to deliver the diagnostic feedback required by the ECU for the listed Subaru and Toyota fitments.