Delphi ES10403 Oxygen Sensor - Front or Rear

Delphi ES10403 Heated Oxygen Sensor Overview

The Delphi ES10403 is a heated oxygen sensor designed for precise emission control in select Audi and Volkswagen models. Engineered with a 4-wire configuration and a flat connector shape, this sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor with 4 wires for reliable operation
• Flat connector shape for secure and easy installation
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 1140 mm to fit front and rear positions
• Includes oxygen sensor and instruction sheet for installation guidance

Technical Details and Compatibility

The Delphi ES10403 oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving sensor response time and emission control efficiency. Its 4-wire design supports both the sensor signal and heater circuit, ensuring consistent performance. The flat connector shape simplifies wiring connections, reducing installation errors. With a thread size of 18 x 1.5 mm and an overall length of 1140 mm, this sensor fits front and rear positions depending on the vehicle's specific requirements. Compatible with Audi A4, A4 Quattro, Cabrio, and Volkswagen Golf, Jetta, and Passat models, the ES10403 is engineered to meet OEM specifications for these vehicles.

Applications and Problem Resolution

• Helps maintain proper air-fuel ratio for efficient combustion
• Reduces harmful emissions by providing accurate oxygen level data
• Addresses engine performance issues such as rough idling or hesitation
• Prevents check engine light triggers related to oxygen sensor faults
• Supports fuel economy by optimizing engine management systems

Installation Notes and Tips

When installing the Delphi ES10403 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the included instruction sheet for guidance on sensor placement and wiring connections. Verify the correct sensor position (front or rear) based on your vehicle’s specifications. Apply anti-seize compound to the threads if recommended by the vehicle manufacturer to facilitate future removal. Tighten the sensor to the specified torque to prevent leaks or damage.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet strict quality standards and OEM requirements. The ES10403 part number undergoes rigorous testing to ensure durability and accurate sensor readings under various operating conditions. This product typically includes a limited warranty covering defects in materials and workmanship. For detailed warranty information, refer to the product documentation or contact the manufacturer.