Delphi ES20352 Oxygen Sensor - Front, Rear or Rear Left

Delphi ES20352 Heated Oxygen Sensor Overview

The Delphi ES20352 oxygen sensor is designed to provide accurate emissions control for a range of GM and related vehicles. This heated oxygen sensor features a 4-wire design and a square connector shape, ensuring reliable performance and compatibility with specific front and rear positions on your vehicle.

• Heated oxygen sensor for faster warm-up and accurate readings
• 4-wire configuration for precise signal transmission
• Square connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm for direct replacement
• Overall length of 430.0 mm to match OEM specifications
• Includes oxygen sensor and instruction sheet for installation guidance

Technical Details and Compatibility

The Delphi ES20352 oxygen sensor is engineered to meet the exacting standards required 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, improving responsiveness and durability. The square connector shape and 18 x 1.5 mm thread size ensure a secure fit in the exhaust system. With an overall length of 430 mm, this sensor fits correctly in designated front, rear, or rear left positions depending on your vehicle's requirements.

This oxygen sensor is compatible with a variety of makes and models including Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, and Saab. Specific models supported include the Chevrolet Avalanche, Silverado 1500, Suburban 1500, Tahoe, Cadillac Escalade, CTS, and DTS, GMC Sierra 1500, Yukon XL, Hummer H2 and H3, Isuzu i-280 and i-350, Pontiac Grand Prix, Saab 9-7x, and others. The part number ES20352 ensures you receive the correct sensor for your vehicle’s emission system.

Common Applications and Problem Resolution

• Restores accurate oxygen level readings for optimal fuel mixture
• Helps resolve check engine light issues related to oxygen sensor faults
• Improves fuel efficiency by providing precise feedback to the engine control unit
• Reduces harmful emissions by maintaining proper catalytic converter function
• Eliminates rough idling or poor engine performance caused by faulty sensors

Installation Notes and Tips

Before installation, verify the sensor position required for your vehicle (front, rear, or rear left) to ensure proper fitment. Use the included instruction sheet for guidance on torque specifications and connector engagement. It is recommended to disconnect the battery before sensor replacement to avoid electrical issues. Apply anti-seize compound to the threads if not pre-coated, and ensure the sensor wiring is routed away from hot exhaust components to prevent damage.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES20352 part number undergoes rigorous testing to ensure reliable operation in emission control systems. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship, providing confidence in the sensor’s long-term functionality.