Walker 350-64073 Oxygen Sensor

Walker 350-64073 Oxygen Sensor Overview

Walker Products 350-64073 is a heated oxygen sensor built as a specific-fit OE replacement for select Lexus, Toyota, and Scion applications. It is engineered to deliver the ECU feedback needed for accurate fuel control and emissions monitoring on upstream sensor locations.

Walker Products Aftermarket focuses on application-specific engine management sensors, and this part follows that approach with the correct fitment position, connector style, and threaded mounting design for the listed vehicles.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed upstream positions
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for OE-style connection
• Wiring harness length: 12.32 in.; overall length: 15.87 in.

Detailed Description

The Walker 350-64073 oxygen sensor is designed for upstream exhaust monitoring on a wide range of Toyota and Lexus vehicles, including Toyota Corolla, Prius, Highlander, Land Cruiser, and Lexus IS350, RC350, LS500, and LC500 applications. It is also listed for select Scion models such as the iQ, xD, and Prius C-related fitments. This part number is built to match the required sensor location and provide the diagnostic feedback the ECU expects for emissions and fuel-trim control.

As an OE-style replacement, this sensor is intended for vehicles where the original upstream oxygen sensor has failed, triggered a malfunction indicator light, or caused drivability and emissions concerns. Walker Products 350-64073 is part of the Walker Products Aftermarket engine management line, which is focused on application-specific sensor replacement for modern fuel-injected vehicles.

This part cross-references Denso 234-9041 and NTK 24302 for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy from incorrect air-fuel feedback
• Rough running or inconsistent engine performance
• Elevated exhaust emissions from a failing sensor
• Stored ECU fault codes tied to sensor circuit or response issues

Installation Notes and Tips

• Confirm the exact year, make, model, and sensor position before ordering.
• Match the upstream location shown in the fitment data, including right, left, front, or general upstream applications.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Verify the threaded mounting point and connector orientation against the original part.
• Clear diagnostic trouble codes after installation and confirm proper ECU feedback during a road test.

Quality Assurance

Walker Products manufactures engine management sensors as OE replacement parts for global vehicle applications and produces this sensor to the specified fitment and feedback requirements of the listed vehicles.