Delphi ES20371 Oxygen Sensor - Rear

Delphi Heated Oxygen Sensor for Mazda 3 and 5

The Delphi ES20371 oxygen sensor is designed to provide accurate emissions monitoring for Mazda 3 and Mazda 5 vehicles. This heated oxygen sensor features a 4-wire design and a square connector shape, ensuring reliable performance and compatibility with your vehicle's emission control system.

Key Features of Delphi ES20371 Oxygen Sensor

• Heated sensor type for faster response times 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 rear exhaust ports
• Overall length of 830 mm to accommodate vehicle-specific installation requirements
• Includes oxygen sensor and instruction sheet for installation guidance
• Positioned for rear exhaust placement on Mazda 3 and Mazda 5 models

Detailed Description of the Delphi ES20371 Oxygen Sensor

The Delphi ES20371 oxygen sensor is engineered to meet the emission control needs of Mazda 3 and Mazda 5 vehicles. Its heated sensor design allows the unit to reach optimal operating temperature quickly, which helps reduce emissions and improve fuel economy. The 4-wire setup supports both the sensor signal and heater circuit, ensuring consistent and accurate oxygen level readings. The square connector shape and 18 x 1.5 mm thread size provide a secure and precise fit in the rear exhaust position, maintaining the integrity of the vehicle’s emission system. With an overall length of 830 mm, this sensor is designed to fit the specific layout of the exhaust system on compatible Mazda models.

Common Issues Addressed by This Oxygen Sensor

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture data
• Increased emissions from inefficient combustion monitoring
• Engine performance problems related to exhaust gas sensor failure
• Failed emissions tests caused by sensor malfunction

Installation Notes and Tips

• Ensure the vehicle is cooled down before sensor removal to avoid burns
• Use the correct 18 x 1.5 mm thread size tools to prevent damage
• Verify the square connector aligns properly with the vehicle harness
• Follow the included instruction sheet for torque specifications and wiring checks
• Inspect the exhaust port for debris or damage before installation

Quality Assurance and Warranty Information

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES20371 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. Refer to the product documentation or contact the vehicle manufacturer for exact warranty terms.