Delphi ES20319 Oxygen Sensor - Center, Front or Rear

Delphi ES20319 Heated Oxygen Sensor Overview

The Delphi ES20319 oxygen sensor is designed to provide accurate emissions control for select GM vehicles. This heated oxygen sensor features a 4-wire design and a square connector shape, ensuring reliable performance in Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac models.

• Heated oxygen sensor for faster warm-up and improved efficiency
• 4-wire configuration for precise signal transmission
• Square connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified GM vehicles
• Overall length of 310.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance

Technical Details and Compatibility

The Delphi ES20319 oxygen sensor is engineered to meet OEM specifications for emission control systems. Its heated sensor type allows quicker activation, reducing emissions during cold starts. The 4-wire design supports both the sensor signal and heater circuit, enhancing responsiveness and durability. The square connector shape ensures a secure electrical connection, minimizing the risk of disconnection or signal loss. With a thread size of 18 x 1.5 mm and an overall length of 310.0 mm, this sensor fits precisely in the exhaust system locations specified for your vehicle.

This oxygen sensor is compatible with a range of GM vehicles including Buick Alero, Cadillac DeVille, Chevrolet Impala, GMC Sierra, Oldsmobile Aurora, and Pontiac Grand Prix among others. It is suitable for center, front, and rear sensor positions depending on the vehicle’s emission system layout.

Common Applications and Problem Resolution

• Helps maintain optimal air-fuel mixture for efficient engine performance
• Reduces exhaust emissions by providing accurate oxygen level data
• Addresses issues such as rough idling and poor fuel economy
• Prevents check engine light triggers related to oxygen sensor faults
• Supports proper catalytic converter function by monitoring exhaust gases

Installation Notes and Tips

Before installation, verify the sensor position required for your specific vehicle model. Use the included instruction sheet for guidance on torque specifications and connector engagement. Ensure the thread size matches the exhaust port to avoid leaks. It is recommended to disconnect the battery before sensor replacement to prevent electrical shorts. Properly route the wiring harness to avoid heat damage or interference with moving parts.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet strict quality standards and OEM requirements. The ES20319 part number undergoes rigorous testing to ensure durability and accurate sensor readings. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects to provide confidence in product reliability.