Walker 350-34310 Oxygen Sensor - Downstream or Downstream Rear

Overview of Walker 350-34310 Oxygen Sensor

The Walker 350-34310 oxygen sensor is designed specifically for select Lexus and Toyota models, including the Highlander, RX350, RX400h, and RX450h. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated sensor type for faster response times
• Specific fit for Lexus and Toyota models
• 23.15 inches wiring harness length for precise installation
• 20 gauge wire measurement with 4 wires for reliable signal transmission
• Radiused polygon female connector for secure connection
• 18.0 mm threaded mounting for proper fitment
• Overall length of 26.69 inches for compatibility with OEM specifications

Walker Products Aftermarket Line Details

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing replacement emission control components that meet or exceed OEM standards. The line emphasizes precise fitment and durability, making it suitable for maintaining factory-level performance in Lexus and Toyota vehicles.

Product Description and Attributes

The Walker 350-34310 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 4-wire design includes a dedicated heater circuit, enhancing sensor responsiveness. With a wiring harness length of 23.15 inches and an overall length of 26.69 inches, this sensor is engineered for a specific fitment, ensuring compatibility with the exhaust system of Lexus Highlander, RX350, RX400h, and RX450h models. The radiused polygon female connector and 18.0 mm threaded mounting type provide secure and reliable installation.

Common Applications and Issues Addressed

• Helps resolve poor fuel economy caused by faulty oxygen sensors
• Reduces rough idling and engine hesitation
• Prevents increased emissions and failed emissions tests
• Corrects check engine light triggers related to oxygen sensor faults
• Maintains optimal air-fuel mixture for engine performance

Installation Notes and Tips

When installing the Walker 350-34310 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 radiused polygon female connector aligns properly with the vehicle’s wiring harness. Thread the sensor carefully into the exhaust port to prevent cross-threading. It is recommended to apply anti-seize compound on the threads if not pre-applied.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. The 350-34310 part number undergoes rigorous testing to comply with emission control requirements. Warranty coverage details should be confirmed with the product documentation or supplier.