Walker 350-34442 Oxygen Sensor - Downstream Left

Overview of Walker Oxygen Sensor 350-34442

The Walker 350-34442 oxygen sensor is designed specifically for select INFINITI and Nissan vehicles, including the Pathfinder and QX4 models. This heated oxygen sensor ensures accurate emissions monitoring and optimal engine performance through precise air-fuel mixture readings.

• Heated sensor type for faster activation
• Specific fit for INFINITI Pathfinder and Nissan QX4
• Threaded mounting with 18.0 mm thread diameter
• 45.39 inches wiring harness length with 4 wires of 20 gauge
• Radiused polygon male connector for secure connection
• Overall length of 48.94 inches for proper installation

Detailed Product Features and Specifications

This oxygen sensor from Walker Products Aftermarket is engineered with a heated sensor element to reduce warm-up time, improving emissions control efficiency. The sensor features a threaded mounting type with an 18.0 mm thread diameter, ensuring a secure and precise fit in the exhaust system. The wiring harness length measures 45.39 inches, providing ample length for installation in the engine bay, while the 20 gauge wire size and 4-wire configuration support reliable signal transmission and heater operation. The connector is a radiused polygon shape with a male gender, designed to match the factory wiring harness for the Nissan QX4 and INFINITI Pathfinder models.

Walker Products Aftermarket Line Information

The Walker Products Aftermarket line focuses on providing replacement emission control components that meet or exceed OEM specifications. This oxygen sensor is part of that line, offering a direct fit and function for specific vehicle applications. The product line emphasizes durability and compatibility, making it suitable for maintaining factory-level emissions performance on Nissan and INFINITI vehicles.

Common Applications and Problem Resolution

• Restores accurate oxygen sensing for proper air-fuel mixture control
• Helps resolve check engine light issues related to oxygen sensor faults
• Improves fuel efficiency by providing correct emissions data
• Reduces exhaust emissions by ensuring proper catalytic converter operation
• Eliminates rough idling or engine hesitation caused by faulty sensors

Installation Notes and Tips

When installing the Walker 350-34442 oxygen sensor, ensure the threaded mounting hole is clean and free of debris. Use anti-seize compound on the threads if recommended by the vehicle manufacturer to prevent seizing. Connect the radiused polygon male connector securely to the factory harness to avoid signal interruptions. Verify the wiring harness routing to prevent contact with hot exhaust components or moving parts. Proper torque specifications should be followed to avoid sensor damage.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards for fit, form, and function. Each sensor undergoes rigorous testing to ensure reliable performance in emission control systems. While specific warranty details are not provided here, Walker typically offers coverage against defects in materials and workmanship, supporting long-term durability and vehicle compliance.