Delphi ES20012 Oxygen Sensor - Front or Rear

Delphi ES20012 Heated Oxygen Sensor Overview

The Delphi ES20012 is a heated oxygen sensor designed for precise emission control in select Buick, Cadillac, Chevrolet, GMC, and Saturn vehicles. Engineered with a 4-wire configuration and a triangle-shaped connector, this sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor with 4 wires for reliable operation
• Triangle-shaped connector for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 520.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Compatible with front and rear positions depending on vehicle model

Technical Details and Compatibility

The Delphi ES20012 oxygen sensor features a heated design that allows it to reach operating temperature quickly, improving emission control efficiency. The 4-wire setup includes two wires for the heating element and two for the sensor signal, ensuring accurate and stable readings. Its triangle-shaped connector matches factory specifications for a secure electrical connection. With a thread size of 18 x 1.5 mm and an overall length of 520.0 mm, this sensor fits properly in the exhaust system of various models including Buick Enclave, Cadillac CTS, Chevrolet Equinox, GMC Terrain, and Saturn Outlook. For exact sensor position (front or rear), refer to your vehicle’s service manual or OEM specifications.

Applications and Problem Resolution

• Helps maintain proper air-fuel ratio for efficient combustion
• Reduces harmful emissions by providing accurate oxygen level data
• Prevents engine performance issues related to faulty oxygen sensors
• Addresses check engine light triggers caused by sensor failure
• Improves fuel economy by enabling precise engine management

Installation Notes and Tips

Before installation, verify the sensor position (front or rear) specific to your vehicle model. Use the included instruction sheet for guidance. Ensure the engine and exhaust system are cool to avoid burns. Apply anti-seize compound to the sensor threads if recommended by the vehicle manufacturer. Tighten the sensor to the specified torque to prevent leaks or damage. Confirm the electrical connector matches the triangle shape for proper connection.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES20012 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. Consult product documentation or your parts provider for exact warranty terms.