Delphi ES20358 Oxygen Sensor - Center or Rear

Delphi ES20358 Heated Oxygen Sensor Overview

The Delphi ES20358 is a heated oxygen sensor designed specifically for Ford Focus models. This sensor plays a critical role in monitoring exhaust gases to optimize engine performance and emissions control.

• Heated sensor type for faster warm-up and accurate readings
• 4-wire configuration ensuring reliable electrical connections
• Square connector shape for secure fitment
• Thread size of 18 x 1.5 mm compatible with specified Ford Focus exhaust ports
• Overall length of 350.0 mm for proper installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Positioned for center and rear exhaust locations depending on vehicle specifics

Technical Details and Compatibility

The Delphi ES20358 oxygen sensor features a heated design that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its 4-wire setup supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape matches the factory wiring harness on Ford Focus vehicles, simplifying installation. With a thread size of 18 x 1.5 mm and an overall length of 350 mm, this sensor fits precisely in the designated exhaust ports, typically located at the center or rear positions. Always verify the exact sensor position for your specific Ford Focus model year and engine type before installation.

Purpose and Common Issues Addressed

• Helps maintain optimal air-fuel mixture for efficient combustion
• Reduces harmful emissions by providing accurate oxygen level data
• Prevents engine performance problems such as rough idling or hesitation
• Resolves check engine light triggers related to oxygen sensor faults
• Improves fuel economy by enabling precise engine control adjustments

Installation Notes and Tips

When installing the Delphi ES20358 oxygen sensor on a Ford Focus, ensure the engine and exhaust system are cool to avoid burns. Use the included instruction sheet for guidance on sensor orientation and wiring connections. Apply anti-seize compound to the sensor threads if recommended, but avoid contaminating the sensor tip. Confirm the sensor position (center or rear) matches your vehicle’s requirements to ensure proper function. After installation, clear any diagnostic trouble codes and verify sensor operation with a scan tool.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM specifications for durability and accuracy. The ES20358 part number undergoes rigorous testing to ensure reliable emissions control and engine performance. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship. Consult product documentation or authorized sources for exact warranty terms related to this oxygen sensor.