Delphi ES20355 Oxygen Sensor - Front or Rear

Delphi ES20355 Heated Oxygen Sensor Overview

The Delphi ES20355 is a heated oxygen sensor designed for precise emission control in select Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, and Saab vehicles. This sensor features a 4-wire configuration and a triangle-shaped connector, ensuring reliable fitment and performance in front exhaust positions.

• Heated oxygen sensor for accurate air-fuel mixture readings
• 4-wire design for improved signal stability
• Triangle-shaped connector for secure electrical connection
• Thread size of 18 x 1.5 mm for proper installation
• Overall length of 500 mm to fit front exhaust locations
• Includes oxygen sensor and instruction sheet

Technical Details and Compatibility

The Delphi ES20355 oxygen sensor is engineered to meet OEM specifications for emission control systems. Its heated sensor type allows for faster warm-up times, improving engine efficiency and reducing emissions. The 4-wire design supports both the sensor signal and heater circuit, enhancing durability and responsiveness. The triangle connector shape ensures a precise and secure fit, minimizing the risk of electrical issues. With a thread size of 18 x 1.5 mm and an overall length of 500 mm, this sensor is intended for front exhaust positions on compatible vehicles.

This oxygen sensor is compatible with a range of models including Buick LaCrosse and Regal, Cadillac STS, Chevrolet Impala, Malibu, and Trailblazer, GMC Canyon, Envoy, and Sierra, Hummer H3 and H3T, Isuzu i-280, i-290, i-350, i-370, and Saab 9-5 and 9-7x. The part number ES20355 ensures you receive the correct sensor for these applications.

Common Applications and Problem Resolution

• Helps maintain optimal air-fuel ratio for efficient combustion
• Reduces engine misfires caused by faulty oxygen sensor readings
• Prevents increased emissions and failed emissions tests
• Addresses poor fuel economy linked to sensor malfunction
• Eliminates rough idling and hesitation due to inaccurate sensor data

Installation Notes and Tips

When installing the Delphi ES20355 oxygen sensor, ensure the engine is cool to avoid burns. Use the correct 18 x 1.5 mm thread size to avoid cross-threading. Verify the triangle-shaped connector aligns properly with the vehicle harness for a secure connection. Follow the included instruction sheet for torque specifications and wiring details. It is recommended to inspect the exhaust system for leaks before installation to ensure accurate sensor readings.

Quality Assurance and Warranty

Delphi manufactures the ES20355 oxygen sensor to meet strict quality standards, ensuring reliable performance and durability. This sensor undergoes rigorous testing to comply with emission control requirements. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects. Refer to the product documentation for exact warranty terms.