Delphi ES10301 Oxygen Sensor - Front, Rear or Upstream

Delphi Heated Oxygen Sensor for Subaru Vehicles

The Delphi ES10301 oxygen sensor is designed to provide accurate emissions data for Subaru Forester, Impreza, and Legacy models. This heated oxygen sensor helps maintain optimal engine performance and emissions control by delivering precise air-fuel mixture readings.

• Heated sensor type for faster response times
• 3-wire design with a square connector shape
• Thread size of 18 x 1.5 mm for secure fitment
• Overall length of 460.0 mm to suit specific vehicle positions
• Includes oxygen sensor and instruction sheet for installation guidance
• Compatible with front, rear, and upstream positions depending on vehicle requirements

Technical Details and Compatibility

The Delphi ES10301 oxygen sensor features a heated element that allows the sensor to reach operating temperature quickly, improving emissions control efficiency. Its 3-wire configuration supports reliable electrical connections, while the square connector shape ensures proper mating with Subaru wiring harnesses. The 18 x 1.5 mm thread size matches factory specifications for Subaru Forester, Impreza, and Legacy models, ensuring a secure and leak-free installation. With an overall length of 460.0 mm, this sensor fits designated front, rear, or upstream positions as required by your vehicle's emission system.

Common Applications and Problem Resolution

• Helps correct inaccurate air-fuel ratio readings
• Reduces engine misfires related to faulty oxygen sensors
• Improves fuel efficiency by optimizing combustion
• Prevents check engine light triggers due to sensor failure
• Supports emissions compliance by monitoring exhaust gases

Installation Notes and Tips

Before installation, verify the sensor position required for your specific Subaru model and engine configuration. Use the included instruction sheet for guidance on proper torque and connector engagement. It is recommended to apply anti-seize compound on the threads to facilitate future removal. Ensure the electrical connector is securely fastened to avoid signal interruptions. Replacement oxygen sensors should be installed when the engine is cool to prevent injury.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES10301 part number undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty terms may vary, Delphi typically offers coverage against defects in materials and workmanship. Consult product documentation or your parts provider for detailed warranty information.