Delphi ES20059 Oxygen Sensor - Front, Rear, Rear Left or Rear Right

Delphi ES20059 Heated Oxygen Sensor Overview

The Delphi ES20059 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 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 models
• Overall length of 580 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Position-specific fitment: front, rear, rear left, and rear right

Technical Details and Compatibility

The Delphi ES20059 oxygen sensor features a heated design that allows it to reach operating temperature quickly, improving sensor response time and reducing emissions during cold starts. The 4-wire setup supports both the sensor signal and heater circuit, ensuring consistent performance. Its square connector shape and 18 x 1.5 mm thread size provide a secure and precise fit in the exhaust system. With an overall length of 580 mm, this sensor is designed to fit the exhaust ports of various Lexus and Toyota models, including Camry, GS300, GS350, GS450h, IS250, IS300, IS350, IS F, SC300, Solara, and Supra.

Compatible Vehicles and Applications

This oxygen sensor is compatible with multiple Lexus and Toyota vehicles, making it suitable for emission control system repairs or replacements. It is position-specific, fitting front, rear, rear left, and rear right locations depending on the vehicle model and exhaust configuration.

• Compatible with Lexus GS300, GS350, GS450h, IS250, IS300, IS350, IS F, SC300
• Compatible with Toyota Camry, Solara, and Supra models
• Designed for use in emission control systems to monitor oxygen levels
• Helps maintain proper air-fuel ratio for engine efficiency and emissions compliance

Common Issues Addressed by the Delphi ES20059 Oxygen Sensor

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture
• Increased emissions and failed emissions tests
• Engine performance issues such as rough idling or hesitation
• Delayed sensor response during cold starts

Installation Notes and Tips

When installing the Delphi ES20059 oxygen sensor, ensure the correct sensor position is identified based on your vehicle’s exhaust layout. Use the included instruction sheet for guidance. Apply anti-seize compound to the threads if recommended by the vehicle manufacturer to prevent seizing. Tighten the sensor to the specified torque to avoid damage. Disconnect the battery before installation to prevent electrical issues.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM specifications for durability and performance. The ES20059 part number undergoes rigorous testing to ensure reliable operation in emission control systems. Warranty coverage details should be confirmed with the point of purchase or Delphi directly, as warranty terms may vary.