Walker 350-34438 Oxygen Sensor - Downstream Left or Downstream Right

Overview of Walker 350-34438 Oxygen Sensor

The Walker 350-34438 oxygen sensor is designed specifically for select Lexus models, including the GS350, IS250, IS300, IS350, RC300, and RC350. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine management system.

• Heated oxygen sensor with 4-wire configuration
• Specific fit for Lexus GS350, IS250, IS300, IS350, RC300, and RC350
• Threaded mounting type with 18.0 mm thread diameter
• 41.85 inches wiring harness length with 20 gauge wire
• Radiused polygon male connector for secure connection
• Overall length of 45.39 inches for proper installation

Walker Products Aftermarket Line Details

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing reliable emission control components tailored to specific vehicle applications. The product line emphasizes precise fitment and quality construction to meet or exceed OEM standards, ensuring compatibility and durability for emission sensors like the 350-34438.

Product Features and Specifications

The Walker 350-34438 oxygen sensor features a heated sensor type that allows for faster warm-up times and improved sensor responsiveness. It includes a 4-wire design, which supports both the sensor signal and heater circuit, essential for maintaining accurate readings under various operating conditions. The sensor’s wiring harness length of 41.85 inches and overall length of 45.39 inches provide sufficient reach for installation in the specified Lexus models. The radiused polygon male connector ensures a secure and reliable electrical connection, while the threaded mounting type with an 18.0 mm diameter allows for straightforward installation and replacement.

Applications and Common Issues Addressed

• Restores accurate oxygen sensing for proper air-fuel mixture control
• Helps resolve engine performance issues such as rough idling or hesitation
• Reduces emissions by ensuring correct sensor feedback to the ECU
• Prevents check engine light triggers related to oxygen sensor faults
• Supports fuel efficiency by maintaining optimal combustion conditions

Installation Notes and Tips

When installing the Walker 350-34438 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct socket size for the 18.0 mm threaded sensor to prevent damage. Verify the connector orientation matches the radiused polygon male connector for a secure fit. It is recommended to inspect the wiring harness for any damage before installation and to apply anti-seize compound on the threads if not pre-applied to facilitate future removal.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards, ensuring reliable performance and durability. The 350-34438 part number undergoes rigorous testing to comply with emission control requirements. Warranty coverage details should be confirmed with the product documentation or supplier, as it may vary by region or distributor.