Delphi ES20211 Oxygen Sensor - Rear

Delphi ES20211 Heated Oxygen Sensor Overview

The Delphi ES20211 is a heated oxygen sensor designed for precise emission control in select Hyundai and Kia vehicles. Engineered to meet OEM specifications, this sensor ensures accurate air-fuel mixture readings for optimal engine performance and reduced emissions.

• Heated sensor type for faster warm-up and improved efficiency
• 4-wire design for reliable signal transmission
• Square connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 575.0 mm for correct installation depth
• Positioned for rear installation in the exhaust system
• Includes oxygen sensor and instruction sheet for installation guidance

Technical Details and Compatibility

The Delphi ES20211 oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving sensor response time and reducing emissions during cold starts. Its 4-wire configuration 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 for rear exhaust positions on Hyundai Optima, Hyundai Santa Fe, and Kia Sonata models. With an overall length of 575.0 mm, this sensor fits correctly within the exhaust system to deliver accurate oxygen level readings.

Applications and Problem Resolution

This oxygen sensor is compatible with the following vehicles:

• Hyundai Optima
• Hyundai Santa Fe
• Kia Sonata

It is designed to address common issues such as:

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture
• Increased exhaust emissions failing emissions tests
• Engine performance problems related to sensor malfunction
• Rough idling or hesitation during acceleration

Installation Notes and Tips

When installing the Delphi ES20211 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the included instruction sheet for proper wiring and torque specifications. Verify the square connector aligns correctly to prevent connection issues. It is recommended to inspect the exhaust threads and clean them before installation to ensure a secure fit. After installation, clear any diagnostic trouble codes and perform a test drive to confirm sensor operation.

Quality Assurance and Warranty

Delphi manufactures the ES20211 oxygen sensor to meet strict quality standards, ensuring durability and reliable performance. This sensor undergoes rigorous testing to comply with emission control requirements. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship. Refer to the product documentation for exact warranty terms.