Delphi ES20209 Oxygen Sensor - Front, Rear or Rear Right

Delphi ES20209 Heated Oxygen Sensor Overview

The Delphi ES20209 oxygen sensor is designed for precise emission control in select Acura and Honda vehicles. This heated sensor ensures accurate air-fuel mixture readings, supporting optimal engine performance and reduced emissions for models like the Civic, NSX, and Prelude.

• Heated oxygen sensor for faster warm-up and accurate readings
• 4-wire design for reliable signal and heater circuit
• Square connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 480.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Position-specific fitment: front, rear, and rear right locations

Technical Details and Compatibility

The Delphi ES20209 oxygen sensor features a heated element that allows the sensor to reach operating temperature quickly, improving emission control efficiency. Its 4-wire configuration supports both the sensor signal and the heating element, ensuring consistent performance. The square connector shape and 18 x 1.5 mm thread size are engineered to match the OEM specifications for Acura and Honda vehicles, including the Civic, NSX, and Prelude models. With an overall length of 480.0 mm, this sensor fits precisely in the designated front, rear, or rear right positions depending on your vehicle's requirements.

Common Applications and Problem Resolution

• Helps resolve check engine light issues related to oxygen sensor faults
• Improves fuel efficiency by providing accurate air-fuel ratio data
• Reduces harmful emissions by enabling proper catalytic converter function
• Addresses rough idling or engine hesitation caused by faulty sensors
• Prevents failed emissions tests due to sensor malfunction

Installation Notes and Tips

When installing the Delphi ES20209 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the included instruction sheet for guidance on sensor positioning and connector attachment. Verify the sensor’s thread size matches the mounting port to prevent cross-threading. It is recommended to apply anti-seize compound on the threads to facilitate future removal. Confirm the sensor is installed in the correct position (front, rear, or rear right) as specified for your Acura or Honda model.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet or exceed OEM standards for durability and performance. The ES20209 part number 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. Refer to the product documentation or contact the manufacturer for exact warranty terms.