Walker 350-34589 Oxygen Sensor - Downstream or Downstream Front

Overview of Walker 350-34589 Oxygen Sensor for Lexus and Toyota

The Walker 350-34589 oxygen sensor is designed specifically for select Lexus and Toyota models, including the Highlander, RX300, and Supra. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated oxygen sensor with flange mount installation
• Specific fit for Lexus Highlander, Toyota RX300, and Supra
• 17.64-inch wiring harness length with 4 wires of 22 gauge
• Radiused polygon male connector for secure connection
• 18.0 mm thread diameter and 21.18-inch overall length

Detailed Product Features and Specifications

This oxygen sensor from Walker Products Aftermarket is engineered with a heated sensor element to provide faster response times and improved accuracy in emissions monitoring. The sensor features a flange mount type for secure and stable installation. Its wiring harness measures 17.64 inches, accommodating a 4-wire setup with 22 gauge wire, ensuring reliable electrical connectivity. The connector is a radiused polygon shape with a male gender, designed to fit precisely with the vehicle’s wiring harness. The sensor’s thread diameter is 18.0 mm, and the overall length is 21.18 inches, matching OEM specifications for a direct replacement.

Walker Products Aftermarket Line Information

The Walker Products Aftermarket line focuses on providing reliable emission control components that meet or exceed OEM standards. This oxygen sensor is part of that line, offering a specific fit and quality construction to maintain proper engine management and emissions compliance for Lexus and Toyota vehicles.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for engine control units
• Helps resolve rough idling and poor fuel economy issues
• Reduces emissions by ensuring proper catalytic converter function
• Prevents check engine light triggers related to oxygen sensor faults
• Improves overall engine performance and drivability

Installation Notes and Tips

When installing the Walker 350-34589 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Confirm the connector’s radiused polygon shape and male gender match the vehicle’s harness for a secure fit. Proper torque on the 18.0 mm thread diameter is essential to prevent leaks. Verify sensor operation after installation by checking for any diagnostic trouble codes.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards for durability and performance. While specific warranty details are not provided here, Walker typically offers coverage against defects in materials and workmanship. Using this sensor helps maintain compliance with emissions regulations and supports long-term vehicle reliability.