Delphi ES20325 Oxygen Sensor - Rear, Rear Left or Rear Right

Delphi ES20325 Heated Oxygen Sensor Overview

The Delphi ES20325 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 shape, 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 200.0 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 ES20325 oxygen sensor is engineered to meet the emission control requirements of various Lexus and Toyota models, including the 4Runner, Avalon, FJ Cruiser, GX460, Land Cruiser, LX470, LX570, Sequoia, 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 sensor heating and signal transmission, while the square connector shape ensures a secure electrical connection. The 18 x 1.5 mm thread size and 200 mm overall length are designed for precise fitment in rear exhaust locations, including rear left and rear right positions, depending on the vehicle's specific configuration.

Common Applications and Problem Resolution

• Helps maintain optimal air-fuel mixture for efficient combustion
• Reduces exhaust emissions by providing accurate oxygen level data
• Addresses engine performance issues related to faulty oxygen sensors
• Prevents check engine light triggers caused by sensor malfunctions
• Supports proper operation of catalytic converters in rear exhaust positions

Installation Notes and Tips

When installing the Delphi ES20325 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the included instruction sheet for guidance on proper torque specifications and connector engagement. Verify the sensor’s position matches the vehicle’s rear, rear left, or rear right exhaust port as required. It is recommended to inspect the wiring harness and connector for damage before installation to ensure reliable sensor operation.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES20325 part number undergoes rigorous testing to ensure compatibility and longevity in the specified Lexus and Toyota models. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects to provide confidence in product reliability.