Walker 350-64006 Oxygen Sensor - Upstream Left or Upstream Right

Walker 350-64006 Oxygen Sensor Overview

Walker Products 350-64006 is a heated oxygen sensor built as a direct OE-style replacement for specific Toyota and Lexus applications. It is engineered for the correct fitment position and ECU feedback on upstream sensor locations, helping maintain accurate air-fuel monitoring in vehicles such as the Toyota Tundra, Toyota Sequoia, Lexus GX460, and Lexus LX570.

Walker Products Aftermarket focuses on application-specific engine management sensors, and this part number is matched to the vehicle position and connector style required for the listed fitments.

Key Features

• Heated oxygen sensor for upstream exhaust monitoring
• Specific fit design for the listed Toyota and Lexus applications
• 4-wire configuration with male connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 4.45
• Overall length: 7.99
• Radiused polygon connector shape for application-specific connection
• Walker Products part number 350-64006

Detailed Product Description

This Walker oxygen sensor is designed for upstream placement where the ECU relies on sensor feedback to manage fuel control and emissions performance. When an oxygen sensor begins to fail, common symptoms can include poor engine operation, higher fuel consumption, increased exhaust emissions, and a malfunction indicator light. For that reason, Walker 350-64006 is a practical replacement choice when diagnosing upstream sensor faults on Toyota Tundra, Toyota Sequoia, Lexus GX460, Lexus LX570, and related applications.

Walker Products Aftermarket develops engine management and oxygen/air-fuel sensors as OE replacement parts for many vehicles worldwide. Part number 350-64006 is built for the specified position and connector layout so it matches the vehicle’s original sensor requirements.

Used For These Issues

• Check engine light related to upstream oxygen sensor performance
• Rough running or inconsistent air-fuel control
• Reduced fuel economy caused by inaccurate sensor feedback
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for oxygen sensor circuits

Installation Notes and Fitment

Fits 2011-2021 Toyota Tundra, upstream right and upstream left. Fits 2012-2017 Toyota Sequoia, upstream right and upstream left. Fits 2013-2015 Toyota Tacoma, upstream right and upstream left. Fits 2013-2016 Toyota Land Cruiser, upstream right and upstream left. Fits 2013-2016 Lexus LX570, upstream right and upstream left. Fits 2013-2015 Lexus GX460, upstream right and upstream left. Fits 2013 Lexus GS350, upstream left. Fits 2013 Lexus IS250, upstream left.

Additional fitment includes 2014 Lexus GS350 upstream left; 2014 Lexus GX460 upstream right and upstream left; 2014 Lexus LX570 upstream right and upstream left; 2014 Toyota Land Cruiser upstream right and upstream left; 2014 Toyota Tundra upstream right and upstream left; 2015 Lexus LX570 upstream right and upstream left; 2015 Toyota Land Cruiser upstream right and upstream left; 2016 Toyota Tundra upstream right and upstream left; 2016 Toyota Land Cruiser upstream right and upstream left; 2016 Lexus LX570 upstream right and upstream left; 2018 Toyota Sequoia upstream right and upstream left; 2018 Toyota Tundra upstream right and upstream left; 2019-2021 Toyota Sequoia upstream right and upstream left; 2022 Toyota Sequoia upstream right; 2022 Lexus GX460 upstream; 2023 Lexus GX460 upstream right.

Before installation, inspect the sensor wiring harness and connector for physical damage and verify the correct bank and side for the vehicle. This part uses threaded mounting and a 4-wire heated sensor design, so matching the original connector and location is important for proper ECU feedback.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an ISO 9001/TS 16949 certified company. The Walker Products Aftermarket line is built around application-specific replacement parts for accurate fitment and dependable sensor communication with the ECU.