Delphi ES20223 Oxygen Sensor - Rear, Rear Left or Rear Right

Delphi ES20223 Heated Oxygen Sensor Overview

The Delphi ES20223 is a heated oxygen sensor designed for precise emission control in select Subaru and Toyota vehicles. Engineered with a 4-wire configuration and a square connector, 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 340.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Position-specific fitment: rear, rear left, and rear right

Technical Details and Compatibility

The Delphi ES20223 oxygen sensor is engineered to meet the emission control requirements of Subaru and Toyota models including the 4Runner, B9 Tribeca, Legacy, Outback, and Tribeca. Its heated sensor type allows for faster warm-up times, improving sensor responsiveness and reducing emissions during cold starts. The 4-wire design supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape and 18 x 1.5 mm thread size provide a secure and precise fit in the rear oxygen sensor locations, including rear left and rear right positions, depending on vehicle specifications.

Common Applications and Problem Resolution

• Helps resolve check engine light issues related to oxygen sensor faults
• Improves fuel efficiency by providing accurate air-fuel ratio data
• Reduces harmful emissions by ensuring proper catalytic converter function
• Addresses rough idling or engine hesitation caused by faulty sensors
• Prevents failed emissions tests due to sensor malfunctions

Installation Notes and Tips

When installing the Delphi ES20223 oxygen sensor, ensure the vehicle is compatible with the specified fitment models and positions. Use the included instruction sheet for guidance on proper torque specifications and connector engagement. It is recommended to replace oxygen sensors when the engine is cool to avoid burns and to apply anti-seize compound on the threads if not pre-applied. Verify the sensor’s connector matches the vehicle harness to avoid electrical issues.

Quality Assurance and Warranty

Delphi manufactures the ES20223 oxygen sensor to meet OEM standards for durability and performance. This sensor undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects to provide confidence in product quality.