Delphi ES10903 Oxygen Sensor - Front or Rear

Delphi ES10903 Oxygen Sensor Overview

The Delphi ES10903 is a heated oxygen sensor designed for precise emission control in Mazda vehicles. Engineered to meet OEM specifications, this sensor supports optimal engine performance and reduced emissions for Mazda Miata and MPV models.

• Heated sensor type for faster warm-up and accurate readings
• 4-wire design ensuring reliable electrical connections
• Square connector shape for secure fitment
• Thread size of 18 x 1.5 mm compatible with specific Mazda exhaust ports
• Overall length of 1020 mm for proper installation
• Includes oxygen sensor and instruction sheet for guidance
• Compatible with front and rear positions depending on vehicle requirements

Technical Details and Compatibility

The Delphi ES10903 oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing harmful emissions. Its 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape is designed to match factory wiring harnesses on Mazda Miata and MPV models, simplifying installation. With a thread size of 18 x 1.5 mm and an overall length of 1020 mm, this sensor fits precisely in designated exhaust locations. For exact positioning—front or rear—refer to your vehicle’s service manual or OEM specifications.

Common Applications and Problem Resolution

• Helps correct inaccurate air-fuel mixture readings
• Reduces engine misfires caused by faulty oxygen sensors
• Improves catalytic converter efficiency by providing accurate data
• Addresses check engine light triggers related to emission control
• Supports smoother engine idling and better fuel economy

Installation Notes and Tips

When installing the Delphi ES10903 oxygen sensor, ensure the engine and exhaust system are cool to avoid burns. Use the correct thread size (18 x 1.5 mm) to avoid cross-threading. Verify the sensor’s position—front or rear—matches your vehicle’s requirements. Connect the 4-wire harness securely to the square connector to maintain proper electrical contact. Follow the included instruction sheet for torque specifications and wiring guidance.

Quality Assurance and Warranty

Delphi manufactures the ES10903 oxygen sensor to meet strict quality standards, ensuring durability and reliable performance in emission control systems. While specific warranty details are not provided here, Delphi products typically come with manufacturer-backed warranties covering defects in materials and workmanship. Consult product documentation or your supplier for exact warranty terms.