Delphi ES20422 Oxygen Sensor - Rear

Delphi Heated Oxygen Sensor for Mazda MX-5 Miata

The Delphi ES20422 oxygen sensor is designed specifically for the rear position on Mazda MX-5 Miata models. This heated oxygen sensor helps maintain optimal engine performance and emissions control by providing accurate exhaust gas readings.

• Heated sensor type for faster response times
• 4-wire design ensuring reliable electrical connections
• Square connector shape for secure fitment
• Thread size of 18 x 1.5 mm compatible with OEM specifications
• Overall length of 475.0 mm for proper installation
• Includes oxygen sensor and instruction sheet

Technical Details and Compatibility

The Delphi ES20422 oxygen sensor features a heated element that allows the sensor to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape matches the factory wiring harness on Mazda MX-5 Miata vehicles, simplifying installation. With a thread size of 18 x 1.5 mm and an overall length of 475.0 mm, this sensor fits precisely in the rear exhaust position, maintaining proper exhaust flow and sensor accuracy.

Common Applications and Problem Resolution

• Helps resolve rough idling caused by incorrect air-fuel mixture readings
• Addresses increased emissions and failed emissions tests
• Improves fuel economy by providing accurate oxygen level data
• Reduces engine hesitation and stalling issues
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Delphi ES20422 oxygen sensor on your Mazda MX-5 Miata, ensure the vehicle is cool to avoid burns. Use an oxygen sensor socket or appropriate wrench to remove the old sensor carefully. Verify the connector shape matches the factory harness before installation. Follow the included instruction sheet for torque specifications and wiring connections. Avoid damaging the sensor tip during handling to maintain sensor accuracy.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES20422 part number undergoes rigorous testing to ensure reliable operation in emission control systems. While specific warranty details are not provided here, Delphi products typically come with a limited warranty covering defects in materials and workmanship.