Delphi ES20326 Oxygen Sensor - Rear, Rear Left or Rear Right

Delphi ES20326 Heated Oxygen Sensor Overview

The Delphi ES20326 is a heated oxygen sensor designed for precise emission control in select Lexus and Toyota vehicles. Engineered with a 4-wire configuration and a square connector, this sensor ensures accurate readings and reliable performance in rear exhaust positions.

• Heated oxygen sensor with 4 wires for efficient operation
• Square connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified models
• Overall length of 235.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Position-specific fitment: rear, rear left, and rear right exhaust locations

Technical Details and Compatibility

The Delphi ES20326 oxygen sensor is engineered to meet the emission control requirements of various Lexus and Toyota models, including the 4Runner, Avalon, Camry, ES300, ES330, ES350, FJ Cruiser, GX470, Land Cruiser, LX470, RAV4, Sequoia, Solara, Tacoma, and Tundra. Its heated sensor type allows for faster warm-up times, improving fuel efficiency and reducing emissions. The 4-wire design supports both the sensor element and the heating circuit, ensuring consistent sensor operation under different driving conditions. The square connector shape and 18 x 1.5 mm thread size provide a secure and precise fit, minimizing installation issues and sensor failure risks.

Common Applications and Problem Resolution

• Helps maintain optimal air-fuel mixture for efficient engine performance
• Reduces exhaust emissions by providing accurate oxygen level data
• Addresses issues such as rough idling and poor fuel economy
• Prevents check engine light triggers related to oxygen sensor faults
• Supports proper catalytic converter function by monitoring exhaust gases

Installation Notes and Tips

When installing the Delphi ES20326 oxygen sensor, ensure the vehicle is compatible with the specified fitment positions (rear, rear left, rear right). Use the included instruction sheet for guidance on torque specifications and connector alignment. It is recommended to disconnect the battery before installation to avoid electrical shorts. Verify the sensor thread size (18 x 1.5 mm) matches the exhaust port to prevent cross-threading. Properly secure the square connector to avoid loose connections that could affect sensor readings.

Quality Assurance and Warranty

Delphi manufactures the ES20326 oxygen sensor to meet OEM standards for durability and performance. The sensor undergoes rigorous testing to ensure reliable operation in demanding conditions. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects. Refer to the product documentation or supplier for exact warranty terms.