Delphi ES20166 Oxygen Sensor - Front, Rear, Rear Left or Rear Right

Delphi ES20166 Heated Oxygen Sensor Overview

The Delphi ES20166 oxygen sensor is designed for precise emission control in select Audi and Volkswagen vehicles. This heated sensor ensures accurate air-fuel mixture readings, supporting optimal engine performance and reduced emissions.

• Heated oxygen sensor for faster response times
• 4-wire design for reliable signal transmission
• Flat connector shape for secure and easy installation
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 1530 mm for proper fitment
• Includes oxygen sensor and instruction sheet
• Compatible with front and rear positions, including rear left and rear right

Technical Details and Compatibility

The Delphi ES20166 oxygen sensor features a heated element that allows the sensor to reach operating temperature quickly, improving fuel efficiency and emissions control. Its 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The flat connector shape simplifies installation and connection integrity. With a thread size of 18 x 1.5 mm and an overall length of 1530 mm, this sensor fits specific positions on Audi and Volkswagen models such as the A4, A6, A8 Quattro, Golf, Jetta, Passat, and others listed in the fitment. This oxygen sensor is designed to replace factory units in front and rear locations, including rear left and rear right positions, depending on vehicle requirements.

Common Applications and Problem Resolution

• Helps correct inaccurate air-fuel mixture readings
• Resolves engine performance issues related to faulty oxygen sensors
• Reduces increased emissions caused by sensor failure
• Addresses check engine light triggers related to oxygen sensor faults
• Improves fuel economy by providing accurate feedback to the engine control unit

Installation Notes and Tips

When installing the Delphi ES20166 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the correct socket size for the 18 x 1.5 mm thread to prevent damage. Verify the sensor position matches the original location (front, rear, rear left, or rear right) for proper operation. Follow the included instruction sheet for wiring and connector details. It is recommended to inspect wiring harnesses and connectors for damage before installation.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM specifications for durability and performance. The ES20166 part number undergoes rigorous testing to ensure reliable operation in emission control systems. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship. Refer to the product documentation for exact warranty terms.