Delphi ES20394 Oxygen Sensor - Rear Left

Delphi Heated Oxygen Sensor for Nissan Pathfinder and Infiniti QX4

The Delphi ES20394 oxygen sensor is designed to provide accurate emissions monitoring for your Nissan Pathfinder or Infiniti QX4. This heated oxygen sensor ensures optimal engine performance and helps maintain compliance with emission standards.

• Heated sensor type for faster response times
• 4-wire design for reliable signal transmission
• Square connector shape for secure fitment
• Thread size of 18 x 1.5 mm for direct replacement
• Overall length of 1240 mm for proper installation
• Positioned for rear left installation
• Includes oxygen sensor and instruction sheet

Technical Details and Compatibility

The Delphi ES20394 oxygen sensor features a heated element that allows the sensor to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape and standard 18 x 1.5 mm thread size make it a direct fit for the rear left position on compatible vehicles. With an overall length of 1240 mm, this sensor is designed to fit precisely without modification.

This oxygen sensor is compatible with Nissan Pathfinder and Infiniti QX4 models, providing a reliable replacement part for emission control systems in these vehicles.

Common Applications and Issues Addressed

• Helps correct inaccurate air-fuel mixture readings
• Reduces engine misfires caused by faulty oxygen sensors
• Improves fuel economy by optimizing combustion
• Prevents check engine light triggers related to emissions
• Supports proper catalytic converter function

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate tools to avoid damaging the sensor or threads
• Apply anti-seize compound on threads if recommended by manufacturer
• Verify the sensor is installed in the rear left position as specified
• Follow the included instruction sheet for detailed installation guidance

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM specifications, ensuring reliable performance and durability. The ES20394 part number undergoes rigorous testing to comply with emission control standards. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.