Walker 350-64112 Oxygen Sensor - Upstream

Walker 350-64112 Upstream Oxygen Sensor

Walker Products 350-64112 is an OE replacement upstream oxygen sensor engineered for precise feedback to the ECU. It is built for specific vehicle applications and fitment positions, helping maintain proper air-fuel control on select Lexus and Toyota models.

Key Features

• OE-style upstream oxygen sensor for emission control systems
• Application-specific fitment for the correct vehicle position
• Provides diagnostic feedback required by the ECU
• Walker Products Aftermarket engine management sensor line
• Part number 350-64112 for streamlined catalog lookup

Detailed Description

This Walker Products Aftermarket oxygen sensor is designed for upstream placement, where it monitors exhaust content before the catalytic converter and sends data used by the engine control system. The 350-64112 is a direct-fit replacement for select Lexus ES250, ES300h, NX250, NX350h, NX450h+, and Toyota Avalon, Camry, RAV4, RAV4 Prime, and Venza applications. It is a practical choice when servicing a vehicle with a stored fault code, poor fuel economy, elevated emissions, or an illuminated malfunction indicator light.

Walker Products has focused on engine management and oxygen/air-fuel sensors for decades, with manufacturing aligned to OE replacement requirements and application-specific fitment. The 350-64112 is intended for the upstream sensor position on the listed vehicles, including 2022-2025 Lexus ES250 and ES300h, 2022-2025 Toyota RAV4, and 2022-2024 Toyota Camry. This part number 350-64112 is also listed for earlier upstream applications such as 2018-2021 Toyota Camry and 2019-2021 Lexus ES300h.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Rough running caused by incorrect air-fuel feedback
• Reduced fuel economy from inaccurate exhaust sensing
• Higher exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the sensor circuit or related systems

Installation Notes and Tips

Confirm the vehicle year, make, model, and upstream position before ordering. For best results, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion during replacement. On vehicles such as the Toyota Camry, Toyota RAV4, and Lexus ES300h, verify the exact sensor location against the service information to ensure the correct upstream installation.

Quality Assurance

Walker Products is an ISO 9001/TS 16949 certified automotive company with a long history in engine management components. Its oxygen and air-fuel sensors are developed as OE replacement parts for specific applications and diagnostic requirements.