Delphi ES20120 Oxygen Sensor - Rear

Delphi Heated Oxygen Sensor for Mazda Protege ES20120

The Delphi ES20120 oxygen sensor is designed specifically for the rear position on Mazda Protege models. This heated oxygen sensor helps maintain optimal engine performance and emission control by providing accurate exhaust gas readings.

Key Features of Delphi ES20120 Oxygen Sensor

• Heated sensor type for faster warm-up and improved accuracy
• 4-wire design ensuring reliable electrical connections
• Square connector shape for secure fitment
• Thread size of 18 x 1.5 mm compatible with Mazda Protege exhaust system
• Overall length of 880 mm for proper installation reach
• Includes oxygen sensor and instruction sheet for installation guidance

Detailed Description of the Delphi ES20120 Oxygen Sensor

The Delphi ES20120 oxygen sensor is engineered to meet the specific requirements of the Mazda Protege rear exhaust system. Its heated sensor element allows the unit to reach operating temperature quickly, which improves fuel efficiency and reduces emissions. The 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape and standard thread size of 18 x 1.5 mm provide a secure and precise fit, minimizing installation issues. With an overall length of 880 mm, this sensor is designed to fit the rear position without modification.

Common Applications and Issues Addressed

• Helps correct inaccurate air-fuel mixture readings
• Reduces engine misfires related to faulty oxygen sensors
• Improves catalytic converter efficiency by providing accurate data
• Resolves check engine light triggers related to rear oxygen sensor faults
• Supports emission control compliance for Mazda Protege vehicles

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate tools to avoid damaging the 18 x 1.5 mm thread
• Verify connector shape matches the vehicle harness before installation
• Follow the included instruction sheet for proper wiring and torque specifications
• Clear any diagnostic trouble codes after installation to reset the system

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES20120 part 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. Consult product documentation or supplier information for exact warranty terms.