Walker 350-64099 Oxygen Sensor

Walker 350-64099 Oxygen Sensor for Toyota and Lexus

Walker Products 350-64099 is a heated oxygen sensor built as a specific-fit OE replacement for select Toyota and Lexus applications. It is engineered to deliver the ECU feedback needed for accurate fuel control and emissions monitoring on vehicles such as the Toyota Tacoma, Toyota Avalon, Toyota Camry, Toyota RAV4, and Lexus ES350.

Key Features

• Heated oxygen sensor for emissions and engine management feedback
• Specific-fit design for the listed upstream and upstream rear positions
• 4-wire configuration with a 20-gauge harness
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 12.32; overall length: 15.87
• Walker Products Aftermarket line for OE-style replacement coverage

Application Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for direct replacement use. Part number 350-64099 is built for the specified vehicle position and wiring layout so the sensor can provide the diagnostic signal the ECU expects. This part number 350-64099 is listed for upstream and upstream rear locations across select Toyota Tacoma, Toyota Avalon, Toyota Camry, Toyota RAV4, and Lexus ES350 applications.

This part cross-references no listed interchange numbers in the provided data.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate exhaust readings
• Elevated exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Confirm the exact upstream or upstream rear position before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since damaged wiring can shorten sensor life and affect signal quality. Verify thread size, connector shape, and wire count against the original part before replacement. For Toyota Tacoma, Toyota Avalon, Toyota Camry, Toyota RAV4, and Lexus ES350 applications, match the listed position and engine-management configuration to the vehicle service information.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The 350-64099 oxygen sensor is produced as an application-specific replacement to support the diagnostic feedback required by the ECU.