Delphi ES20318 Oxygen Sensor - Rear or Rear Left

Delphi ES20318 Heated Oxygen Sensor Overview

The Delphi ES20318 is a heated oxygen sensor designed for precise emission control in select Ford, Jaguar, Lincoln, 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 response times
• 4-wire design ensuring reliable signal transmission
• Round connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 325.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Positioned for rear or rear left exhaust locations

Technical Details and Compatibility

The Delphi ES20318 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 accurate readings and durability. The round connector shape and 18 x 1.5 mm thread size are engineered to fit securely in the rear exhaust positions of compatible vehicles. This sensor is suitable for models such as the Ford Edge, Taurus, and Flex, Jaguar S-Type, Lincoln MKX and MKS, Mazda 6, and Mercury Cougar among others. The overall length of 325.0 mm ensures proper placement within the exhaust system for optimal performance.

Common Applications and Problem Resolution

• Helps resolve rough idling caused by incorrect air-fuel mixture
• Addresses increased fuel consumption due to faulty oxygen sensor readings
• Reduces engine hesitation and stalling issues
• Improves emission test results by maintaining proper exhaust gas monitoring
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

Before installation, verify the sensor position specific to your vehicle model, as this sensor is designed for rear or rear left exhaust locations. Use the included instruction sheet for guidance on proper torque and connector engagement. It is recommended to disconnect the battery before sensor replacement to avoid electrical issues. Ensure the thread size matches the exhaust port to prevent leaks. After installation, clear any diagnostic trouble codes and perform a test drive to confirm sensor operation.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM specifications, ensuring reliable performance and durability. The ES20318 part number undergoes rigorous testing for accuracy and longevity. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship. Refer to the product documentation or vehicle service provider for warranty terms applicable to this sensor.