Delphi ES20190 Oxygen Sensor - Rear Left or Rear Right

Delphi Heated Oxygen Sensor for Nissan and Infiniti Vehicles

The Delphi ES20190 oxygen sensor is designed to provide accurate emissions monitoring for select Nissan and Infiniti models. This heated oxygen sensor ensures optimal engine performance and emissions control by delivering precise air-fuel mixture data to the vehicle’s engine management system.

• Heated sensor type for faster warm-up and improved accuracy
• 4-wire design for reliable electrical connections
• Square connector shape for secure fitment
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 1005.0 mm for proper installation
• Includes oxygen sensor and instruction sheet
• Positioned for rear left and rear right installation

Technical Details and Compatibility

The Delphi ES20190 oxygen sensor features a heated element that allows the sensor to reach operating temperature quickly, reducing emissions during cold starts. Its 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape and 18 x 1.5 mm thread size are engineered to match the rear left and rear right positions on compatible vehicles. This sensor is specifically designed for Nissan I30, Maxima, Pathfinder, and Infiniti QX4 models, providing a direct replacement that meets OEM specifications.

Common Applications and Problem Resolution

• Helps resolve rough idling and engine hesitation caused by faulty oxygen sensors
• Reduces increased fuel consumption due to inaccurate air-fuel mixture readings
• Addresses check engine light triggers related to emissions control
• Improves catalytic converter efficiency by providing accurate exhaust gas data
• Supports compliance with emissions regulations by maintaining sensor functionality

Installation Notes and Tips

When installing the Delphi ES20190 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the correct socket size for the 18 x 1.5 mm threaded sensor to prevent damage. Verify the sensor is installed in the correct rear left or rear right position as specified for your Nissan or Infiniti model. Follow the included instruction sheet for wiring and connector engagement to ensure a secure and proper fit.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet strict quality standards and OEM requirements. The ES20190 part number undergoes rigorous testing to ensure durability and reliable performance in emission control systems. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship to support long-term vehicle operation.