Delphi ES20187 Oxygen Sensor - Rear

Delphi ES20187 Heated Oxygen Sensor Overview

The Delphi ES20187 is a heated oxygen sensor designed for precise emission control in select Nissan and Infiniti vehicles. Engineered with a 4-wire configuration and a square connector, this sensor ensures accurate readings and reliable performance in the rear exhaust position.

• Heated oxygen sensor with 4 wires for fast response
• Square connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified models
• Overall length of 560 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Designed for rear position installation in exhaust system

Technical Details and Compatibility

The Delphi ES20187 oxygen sensor features a heated design that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its 4-wire setup supports both sensor heating and signal transmission, ensuring accurate oxygen level detection. The square connector shape and 18 x 1.5 mm thread size provide a secure and precise fit for the rear exhaust location. With an overall length of 560 mm, this sensor fits properly within the exhaust system of compatible vehicles.

This sensor is compatible with various Nissan and Infiniti models, including the Nissan 200SX, G20, I30, Maxima, and Sentra. It is specifically designed for rear position installation, making it suitable for applications requiring secondary oxygen sensor replacement.

Common Applications and Problem Resolution

• Helps resolve issues related to poor fuel economy caused by faulty oxygen sensors
• Addresses check engine light triggers related to rear oxygen sensor malfunctions
• Improves emission control system performance by providing accurate exhaust gas readings
• Reduces rough idling and engine hesitation linked to sensor failure
• Supports proper catalytic converter function by monitoring oxygen levels downstream

Installation Notes and Tips

When installing the Delphi ES20187 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the included instruction sheet for guidance on proper torque specifications and connector engagement. Verify the sensor’s orientation and thread size match the vehicle’s exhaust port. It is recommended to use anti-seize compound on the threads to facilitate future removal. Confirm the sensor is installed in the rear position as specified for your Nissan or Infiniti model.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES20187 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. Refer to the product documentation for exact warranty terms.