Walker 350-64025 Oxygen Sensor - Upstream Front

Walker 350-64025 Oxygen Sensor for Toyota RAV4

Walker 350-64025 is a specific-fit heated oxygen sensor engineered for OE-style replacement on select Toyota applications. It is built for the upstream front position on 2001-2003 Toyota RAV4 models, where accurate exhaust feedback is needed for engine management and emissions control.

Key Features

• Specific-fit oxygen sensor for the upstream front location
• Heated sensor design for faster operating temperature
• 4-wire configuration with 20-gauge wiring
• 13.31 in. wiring harness length and 16.85 in. overall length
• 18.0 mm thread diameter with threaded mounting
• Radiused polygon connector shape with male connector

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built as direct replacements for defined vehicle applications. Part number 350-64025 is matched to the sensor position and connector layout required by the ECU on the 2001-2003 Toyota RAV4, helping maintain proper diagnostic feedback from the exhaust system. If the original sensor is aging or damaged, this Walker oxygen sensor can restore the signal the engine computer relies on for fuel control and emissions monitoring. Walker 350-64025 is a practical OE-style replacement for Toyota RAV4 upstream front service work.

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

What It Is Used For

• Check engine light related to upstream oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough running or hesitation from inaccurate exhaust readings
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Install in the upstream front position only on 2001-2003 Toyota RAV4 applications listed here. Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since damaged wiring can shorten sensor life and affect operation. Verify thread size, connector shape, and harness routing before installation to ensure the replacement matches the original layout.

Quality Assurance

Walker Products has produced engine management components since 1946 and operates with Automotive ISO9001/TS 16949 certification. The 350-64025 is manufactured as a specific application replacement to support the diagnostic feedback expected by the vehicle ECU.