Walker 350-64079 Oxygen Sensor - Upstream

Walker 350-64079 Upstream Oxygen Sensor

Walker Products 350-64079 is a heated upstream oxygen sensor built for specific OE-style replacement use on select Toyota applications. It is designed for the 1997-1999 Toyota Camry and 1999 Toyota Solara with California emissions ESV fitment, where accurate exhaust feedback is needed for engine management.

Key Features

• Heated oxygen sensor for faster operating temperature and signal response
• Specific fit design for the correct application and mounting position
• Upstream sensor location for exhaust mixture monitoring before the catalytic converter
• 4-wire configuration with a radiused polygon male connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 17.24 in.; overall length: 20.79 in.
• Wire gauge: 20

Detailed Description

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered as OE replacement parts for a wide range of vehicles. Part number 350-64079 is built for specific fitment and position, helping maintain the diagnostic feedback the ECU expects from the upstream sensor circuit. For Toyota Camry and Toyota Solara California emissions ESV applications, this sensor supports accurate air-fuel monitoring and proper emissions system operation.

Walker Products has supplied engine management and fuel system components since 1946 and manufactures to automotive ISO 9001/TS 16949 standards. This part cross-references standard oxygen sensor replacement needs for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy caused by incorrect exhaust mixture feedback
• Rough engine performance from inaccurate ECU sensor input
• Higher exhaust emissions from a failing heated O2 sensor
• Diagnostic trouble codes tied to the sensor, wiring, or connector

Installation Notes and Tips

Install this sensor only in the upstream position specified for the vehicle application. Before replacement, inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since damaged wiring can shorten sensor life and affect readings. Confirm thread size, connector shape, and harness length against the original part before installation.

Quality Assurance

Walker Products manufactures this oxygen sensor as a specific-fit replacement part for the listed Toyota applications and builds it under ISO 9001/TS 16949 quality systems.