Delphi ES20039 Oxygen Sensor - Front or Rear

Delphi ES20039 Heated Oxygen Sensor Overview

The Delphi ES20039 is a heated oxygen sensor designed for precise emission control in select Ford, Mazda, and Mercury vehicles. This sensor helps maintain optimal engine performance and reduces harmful emissions by accurately monitoring oxygen levels in the exhaust system.

• Heated sensor type for faster warm-up and improved accuracy
• 4-wire design ensuring reliable electrical connections
• Round connector shape for secure fitment
• Thread size of 18 x 1.5 mm compatible with specific vehicle exhaust ports
• Overall length of 765.0 mm for proper installation
• Includes oxygen sensor and instruction sheet for installation guidance
• Compatible with front and rear positions depending on vehicle model

Technical Details and Compatibility

The Delphi ES20039 oxygen sensor features a heated element that allows the sensor to reach operating temperature quickly, improving fuel efficiency and emission control. Its 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The round connector shape and 18 x 1.5 mm thread size are designed to match the OEM specifications for a secure and leak-free installation. With an overall length of 765.0 mm, this sensor fits the exhaust system layout of various Ford, Mazda, and Mercury models.

This oxygen sensor is compatible with Ford B3000, B4000, Escape, Escort, Explorer, Focus, Ranger, as well as Mazda Tracer and Mercury Tribute models. For exact sensor positioning (front or rear), refer to your vehicle’s service manual or OEM specifications.

Common Applications and Problem Resolution

• Helps correct engine running issues caused by faulty oxygen sensors
• Reduces rough idling and engine hesitation related to improper air-fuel mixture
• Addresses increased emissions and failed emissions tests
• Improves fuel economy by providing accurate oxygen level data to the engine control unit
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate tools to avoid damaging the sensor or exhaust threads
• Verify sensor position (front or rear) based on your vehicle’s specific requirements
• Apply anti-seize compound on threads if recommended by the manufacturer
• Follow the included instruction sheet for proper wiring and connector engagement

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet or exceed OEM standards for durability and performance. The ES20039 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 or your supplier for exact warranty terms.