Walker 250-54074 Oxygen Sensor - Upstream Left, Upstream Rear or Upstream Right

Walker Products OE Oxygen Sensor for Subaru and Toyota

Walker Products OE Part Number 250-54074 is a heated oxygen sensor built for specific vehicle applications and exact mounting positions. It is engineered as an OE-style replacement for Subaru Legacy, Subaru Outback, Subaru Tribeca, and select Toyota Camry applications with upstream right, upstream left, or upstream rear placement.

Walker Products OE focuses on application-specific engine management sensors that deliver the diagnostic feedback the ECU expects. For vehicles such as the Subaru Legacy and Toyota Camry, correct sensor response is important for fuel control, emissions monitoring, and fault-code diagnosis.

Key Features

• Part number 250-54074
• Heated oxygen sensor design for faster operating response
• Specific fit for the listed vehicle applications
• 4-wire configuration with male connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 5.43
• Overall length: 8.98
• Connector shape: radiused polygon

Detailed Description

This Walker Products OE oxygen sensor is engineered for direct replacement use in the exhaust system where accurate air-fuel feedback is required. It is listed for 2010-2014 Subaru Legacy, 2010-2014 Subaru Outback, and 2010-2014 Subaru Tribeca in upstream right and upstream left positions, plus 2002-2003 and 2005-2006 Toyota Camry upstream rear applications. If you are searching for a Subaru Legacy upstream oxygen sensor or a Toyota Camry upstream rear oxygen sensor, part number 250-54074 is built around those exact fitment needs.

Walker Products OE parts are developed around the vehicle-specific sensor location so the ECU receives the proper signal for emissions and fuel-management monitoring. This helps maintain accurate feedback from the exhaust stream on Subaru and Toyota applications where the sensor location and connector style must match the original setup.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Rough engine operation tied to sensor signal issues
• Elevated exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for sensor or related system faults

Installation Notes and Tips

Confirm the vehicle year, make, model, and sensor position before ordering. This part is listed for upstream right, upstream left, and upstream rear locations depending on application, so match the original sensor placement on the Subaru Legacy, Subaru Outback, Subaru Tribeca, or Toyota Camry. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since damaged wiring can shorten sensor life and affect signal quality.

Use the threaded mounting point and connector style as reference points during replacement. For fitment verification, compare the original sensor connector, wire count, and mounting location to part number 250-54074 before installation.

Quality Assurance

Walker Products OE sensors are manufactured as OE replacement components for specific applications and are backed by the company’s long-standing focus on engine management and fuel system parts. Walker Products has operated since 1946 and maintains ISO 9001/TS 16949 certification for its manufacturing processes.