Walker 250-24449 Oxygen Sensor - Downstream Left

Overview of Walker 250-24449 Oxygen Sensor for Nissan and Infiniti

The Walker Products OE 250-24449 oxygen sensor is designed specifically for select Nissan and Infiniti models, including the Pathfinder and QX4. 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 Nissan Pathfinder and Infiniti QX4
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure electrical connection
• Wiring harness length of 45.39 inches and overall length of 48.94 inches
• Wire gauge measurement of 20 for reliable signal transmission

Detailed Features and Specifications

This Walker oxygen sensor (part number 250-24449) features a heated sensor type that allows for faster warm-up times and improved sensor responsiveness. The 4-wire design includes two wires for the heating element and two for the sensor signal, ensuring accurate and stable readings. The sensor is mounted using a threaded design with an 18.0 mm diameter, compatible with the exhaust system of the Nissan Pathfinder and Infiniti QX4. The connector is a radiused polygon male type, providing a secure and precise fit to the vehicle's wiring harness. With a wiring harness length of 45.39 inches and an overall length of 48.94 inches, this sensor is engineered for proper installation and fitment.

Walker Products OE Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed OEM specifications. This oxygen sensor is part of that line, ensuring compatibility and performance consistent with factory-installed components. Using a Walker Products OE sensor helps maintain the integrity of the vehicle’s emission control system and supports compliance with environmental regulations.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for improved fuel efficiency
• Resolves check engine light issues related to oxygen sensor faults
• Helps reduce harmful emissions by ensuring proper catalytic converter function
• Eliminates rough idling or engine hesitation caused by faulty sensors
• Prevents failed emissions tests due to sensor malfunction

Installation Notes and Tips

When installing the Walker 250-24449 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the connector type matches the vehicle harness before installation. Proper torque should be applied to the sensor to prevent exhaust leaks. It is recommended to inspect wiring and connectors for damage or corrosion during replacement.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. This part number 250-24449 comes with a limited warranty that covers defects in materials and workmanship, providing confidence in its reliability for Nissan Pathfinder and Infiniti QX4 applications.