Walker 350-64018 Oxygen Sensor - Upstream Front or Upstream Rear

Walker 350-64018 Oxygen Sensor for Toyota and Lexus

Walker Products 350-64018 is a heated, specific-fit oxygen sensor engineered as an OE-style replacement for select Toyota and Lexus applications. It is built for threaded mounting and direct ECU feedback, helping restore accurate exhaust monitoring on vehicles such as the Toyota Camry, Toyota Avalon, Toyota Sienna, Toyota Solara, and Lexus ES300.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• Specific-fit design for the listed Toyota and Lexus applications
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for application-specific connection
• Threaded mounting with 18.0 mm thread diameter
• Overall length: 13.9 in.; wiring harness length: 10.35 in.
• Walker Products Aftermarket line engineered for engine management and oxygen/air-fuel sensor replacement

Product Details

Walker Products Aftermarket focuses on engine management sensors built for direct replacement use, and the 350-64018 oxygen sensor follows that approach with application-specific fitment and ECU-relevant feedback. This part number is listed for 2000-2004 Toyota Avalon, 2001-2003 Toyota Sienna, 2001-2003 Toyota Solara, 2000-2001 Lexus ES300, and 2001 Toyota Camry in upstream front or upstream rear positions as specified. If your vehicle is showing an oxygen sensor fault, this Walker 350-64018 replacement is built to match the listed mounting and connector requirements.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Sensor May Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel monitoring
• Higher exhaust emissions due to a failing sensor signal
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

• Confirm the exact position before ordering: upstream front or upstream rear, depending on the vehicle listing.
• Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation.
• Verify thread diameter and connector shape against the original sensor to ensure proper fit.
• Clear diagnostic trouble codes after installation and confirm the repair with a scan tool.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-64018 is produced as a specific application replacement sensor for the listed Toyota and Lexus vehicles, with fitment and signal output intended to align with the original equipment requirements.