NTK 24543 Oxygen Sensor - Downstream Left

Overview of NTK Direct Fit Oxygen Sensor 24543

The NTK Direct Fit Oxygen Sensor 24543 is engineered specifically for Nissan Pathfinder and Infiniti QX4 models. This heated oxygen sensor ensures precise air-fuel mixture readings to support optimal engine performance and emissions control.

• Heated sensor type for faster response times
• Specific fit for Nissan Pathfinder and Infiniti QX4
• Threaded mounting with 18mm thread diameter
• 49.75-inch wiring harness length with 4 wires
• Part number 24543 for accurate identification

Features and Specifications

This oxygen sensor features a heated design that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 49.75-inch wiring harness length provides ample reach for installation in the engine bay, while the 4-wire configuration supports both sensor heating and signal transmission. The threaded mounting type with an 18mm diameter ensures a secure and precise fit in the exhaust system. Designed as a specific fit part, it is compatible with select Nissan and Infiniti models, including the Pathfinder and QX4.

About the NTK Direct Fit Oxygen Sensor Line

The Direct Fit Oxygen Sensor line by NTK is designed to provide exact replacement sensors that match OEM specifications. These sensors are engineered for direct installation without modification, ensuring reliable performance and compatibility. The 24543 sensor is part of this line, offering a precise fit and function for the Nissan Pathfinder and Infiniti QX4, helping maintain proper emission control and engine management.

Common Applications and Issues Addressed

• Restores accurate oxygen level readings for engine control units
• Helps resolve rough idling and poor fuel economy
• Reduces emissions by ensuring proper air-fuel mixture
• Eliminates check engine light triggers related to oxygen sensor faults
• Prevents failed emissions tests due to sensor malfunction

Installation Notes and Tips

When installing the NTK 24543 oxygen sensor, ensure the engine and exhaust system are cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the wiring harness length and connector match the vehicle’s specifications. Thread the sensor by hand initially to avoid cross-threading, then tighten to the manufacturer’s torque specifications. It is recommended to use anti-seize compound on the threads unless pre-applied.

Quality Assurance and Warranty

NTK oxygen sensors undergo rigorous testing to meet OEM standards for durability and performance. The Direct Fit Oxygen Sensor 24543 is manufactured to provide consistent sensor output and long service life. Warranty coverage details should be confirmed with the distributor or vehicle manufacturer, as they may vary by region and application.