Walker 350-64028 Oxygen Sensor - Upstream, Upstream Rear or Upstream Right

Walker 350-64028 Oxygen Sensor Overview

Walker Products 350-64028 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Subaru and Toyota applications. It is engineered to provide the ECU with the exhaust feedback needed for proper fuel control, emissions monitoring, and fault detection.

Use this Walker Products Aftermarket sensor when servicing an upstream oxygen sensor on a 2015-2019 Subaru Legacy or Outback, or an upstream sensor application on select Toyota Highlander, Sienna, Camry, and Solara models.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed vehicle applications
• 4-wire configuration with 20-gauge wiring
• 7.01 in. wiring harness length and 10.55 in. overall length
• 18.0 mm thread diameter with threaded mounting
• Male connector with radiused polygon connector shape
• Walker Products Aftermarket part number 350-64028

Detailed Description

Walker Products engine management and oxygen/air-fuel sensors are developed as replacement parts for original equipment applications. Part number 350-64028 is built for the specified fitment position and is intended to deliver the diagnostic feedback the ECU expects from the sensor circuit. This matters on vehicles such as the Subaru Legacy, Subaru Outback, Toyota Highlander, Toyota Sienna, Toyota Camry, and Toyota Solara, where accurate upstream sensor input supports fuel trim control and emissions system monitoring.

The Walker Products Aftermarket line focuses on application-specific sensor coverage for modern engine management systems. For buyers searching for a 2015-2019 Subaru Legacy upstream right oxygen sensor, a 2015-2019 Subaru Outback upstream right oxygen sensor, or a Toyota Highlander upstream oxygen sensor, 350-64028 is the listed replacement part number.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel correction
• Higher exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the sensor position before installation. This part is listed for upstream right, upstream, and upstream rear positions depending on the vehicle application. Inspect the sensor wiring harness and connector for physical damage before replacement, since damaged wiring can shorten sensor life and affect operation. Verify thread diameter, connector style, and harness length against the original sensor before installation.

Fits 2015-2019 Subaru Legacy, upstream right. Fits 2015-2019 Subaru Outback, upstream right. Fits 2009-2014 Toyota Highlander, upstream. Fits 2004-2010 Toyota Sienna, upstream rear. Fits 2004-2006 Toyota Camry, upstream rear. Fits 2004 Toyota Solara, upstream rear.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates with Automotive ISO9001/TS 16949 certification. Part number 350-64028 is manufactured for the specified application and fitment position to support the diagnostic needs of the vehicle ECU.