Walker 350-34643 Oxygen Sensor - Downstream or Upstream

Walker 350-34643 Oxygen Sensor for Toyota and Lexus

Walker Products 350-34643 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for select Toyota and Lexus applications. It is built for upstream and downstream positions where listed, with the correct connector, wire count, and threaded mounting for the confirmed vehicle fitments.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for confirmed Toyota Camry, Toyota Solara, Toyota Supra, Lexus IS300, and Lexus SC300 applications
• 4-wire configuration with a male connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 20.39 in.; overall length: 23.94 in.
• Radiused polygon connector shape for application-specific fitment
• Walker Products Aftermarket engine management sensor line

Detailed Description

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built for direct replacement use. Part number 350-34643 is manufactured for the specified application and sensor location so the ECU receives the expected feedback from the oxygen sensing system. This matters on vehicles such as the Toyota Camry, Toyota Solara, Toyota Supra, Lexus IS300, and Lexus SC300, where the correct upstream or downstream sensor position is critical to proper emissions and fuel-control operation. If you are replacing a failed Walker 350-34643 sensor, verify the connector, harness routing, and mounting location against the original part before installation.

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 a failing upstream sensor
• Elevated exhaust emissions from inaccurate sensor readings
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm whether your vehicle requires an upstream or downstream sensor before ordering. This listing includes fitments for 1997-2001 Toyota Camry, 1999-2000 Toyota Solara, 1998 Toyota Supra, 2001-2005 Lexus IS300, and 1998-2000 Lexus SC300 in the positions shown in the fitment data. Check the sensor, wiring harness, and connector for physical damage before installation, since damaged wiring can shorten sensor life and affect operation. Always match the original connector style, thread size, and harness length to the vehicle application.

Quality Assurance

Walker Products manufactures engine management sensors as OE-replacement parts for specific applications and positions. The brand states that its oxygen and air-fuel sensors are developed for accurate ECU feedback and produced under Automotive ISO9001/TS 16949 certified quality systems.