Delphi ES10309 Oxygen Sensor - Rear Left or Rear Right

Overview of Delphi ES10309 Heated Oxygen Sensor

The Delphi ES10309 oxygen sensor is designed for precise emission control in select Audi and Volkswagen models. This heated sensor ensures accurate air-fuel mixture readings, helping maintain optimal engine performance and emissions compliance.

• Heated oxygen sensor for faster response times
• 4-wire design with flat connector shape for reliable electrical connection
• Thread size of 18 x 1.5 mm for secure fitment
• Overall length of 1705.0 mm to accommodate rear sensor positions
• Includes oxygen sensor and instruction sheet for installation guidance
• Compatible with rear left and rear right positions depending on vehicle

Detailed Product Description

The Delphi ES10309 oxygen sensor is engineered to meet the specific emission control requirements of Audi A4, A4 Quattro, A6, A6 Quattro, and Volkswagen Passat models. Featuring a heated sensor element, it provides quicker warm-up times compared to unheated sensors, which improves fuel efficiency and reduces emissions during cold starts. The sensor’s 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. Its flat connector shape facilitates a secure and corrosion-resistant electrical connection, while the 18 x 1.5 mm thread size guarantees proper installation in the designated rear left or rear right exhaust locations. The overall length of 1705.0 mm allows for flexible routing in the exhaust system. This part comes with an instruction sheet to assist with proper installation and positioning based on your vehicle’s specifications.

Common Applications and Issues Addressed

• Helps maintain correct air-fuel ratio for efficient combustion
• Reduces engine misfires caused by faulty oxygen sensor readings
• Prevents increased emissions and failed emissions tests
• Improves fuel economy by providing accurate feedback to the engine control unit
• Resolves check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Delphi ES10309 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the instruction sheet provided to verify the correct rear left or rear right position for your specific Audi or Volkswagen model. Apply anti-seize compound to the sensor threads if recommended by the vehicle manufacturer to facilitate future removal. Tighten the sensor to the specified torque to prevent exhaust leaks. Verify the electrical connector is fully seated and secure to avoid signal interruptions.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES10309 part number undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty terms may vary, Delphi typically offers coverage against defects in materials and workmanship. Refer to the product documentation or your supplier for detailed warranty information.