Delphi ES20040 Oxygen Sensor - Center or Rear

Delphi ES20040 Heated Oxygen Sensor Overview

The Delphi ES20040 is a heated oxygen sensor designed for precise emission control in select Ford and Mazda vehicles. Engineered with a 4-wire configuration and a square connector shape, this sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor with 4 wires for reliable operation
• Square connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 870.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for guidance
• Compatible with front and rear positions depending on vehicle requirements

Technical Details and Compatibility

The Delphi ES20040 oxygen sensor features a heated design that allows it to reach operating temperature quickly, improving sensor response time and reducing emissions during cold starts. The 4-wire setup supports both the sensor element and the heating circuit, ensuring consistent performance. Its square connector shape and 18 x 1.5 mm thread size are engineered to match the OEM specifications for Ford Aspire, Mazda Millenia, and Mazda MPV models. The overall length of 870 mm facilitates proper installation depth, critical for accurate exhaust gas measurement.

Applications and Problem Resolution

• Helps maintain optimal air-fuel ratio for efficient combustion
• Reduces engine misfires caused by faulty oxygen sensor readings
• Improves fuel economy by providing accurate feedback to the engine control unit
• Assists in lowering harmful emissions to meet regulatory standards
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Delphi ES20040 oxygen sensor, ensure the vehicle is compatible by verifying the make and model—Ford Aspire, Mazda Millenia, or Mazda MPV. The sensor can be installed in either front or rear positions depending on the vehicle’s specific requirements. Use the included instruction sheet for detailed guidance. Proper torque on the 18 x 1.5 mm threaded connection is essential to avoid exhaust leaks and sensor damage. Disconnect the battery before installation to prevent electrical issues.

Quality Assurance and Warranty

Delphi manufactures the ES20040 oxygen sensor to meet strict OEM standards for durability and performance. While specific warranty details are not provided here, Delphi products typically come with manufacturer-backed warranties to ensure reliability. For warranty information, refer to the product packaging or contact the manufacturer directly.