Delphi ES20366 Oxygen Sensor - Rear

Delphi ES20366 Heated Oxygen Sensor Overview

The Delphi ES20366 is a heated oxygen sensor designed specifically for the rear position on Saturn Ion vehicles. This sensor plays a critical role in monitoring exhaust gases to optimize engine performance and reduce emissions.

• Heated sensor type for faster warm-up and accurate readings
• Four-wire design ensuring reliable electrical connections
• Square connector shape for secure fitment
• Thread size of 18 x 1.5 mm compatible with Saturn Ion exhaust systems
• Overall length of 940 mm for proper installation
• Includes oxygen sensor and instruction sheet for installation guidance

Technical Details and Compatibility

The Delphi ES20366 oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving fuel efficiency and emissions control. Its four-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape is designed to match the factory wiring harness on Saturn Ion models, simplifying installation. With a thread size of 18 x 1.5 mm and an overall length of 940 mm, this sensor fits precisely in the rear exhaust position, maintaining proper sensor placement and function.

Applications and Problem Resolution

This oxygen sensor is compatible with Saturn Ion vehicles requiring a rear heated oxygen sensor replacement. It helps address common issues such as:

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture data
• Increased emissions from inefficient combustion
• Engine performance problems related to exhaust gas monitoring
• Failed emissions tests caused by sensor malfunction

Installation Notes and Tips

When installing the Delphi ES20366 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the included instruction sheet for proper wiring and torque specifications. Verify the square connector aligns correctly with the factory harness to prevent connection issues. It is recommended to apply anti-seize compound on the threads to facilitate future removal. Proper installation in the rear position is essential for accurate sensor operation.

Quality Assurance and Warranty

Delphi manufactures the ES20366 oxygen sensor to meet OEM standards for durability and performance. This part undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship, providing confidence in the sensor’s longevity and function.