Delphi ES20373 Oxygen Sensor - Rear

Delphi ES20373 Heated Oxygen Sensor Overview

The Delphi ES20373 is a heated oxygen sensor designed for precise emission control in Suzuki vehicles. Specifically engineered for the rear position, this sensor helps maintain optimal engine performance and emission standards in Suzuki Esteem and Grand Vitara models.

• Heated sensor type for faster response times
• 4-wire configuration ensuring accurate signal transmission
• Square connector shape for secure and reliable connection
• Thread size of 18 x 1.5 mm for proper fitment
• Overall length of 525.0 mm to match factory specifications
• Includes oxygen sensor and instruction sheet

Technical Details and Compatibility

The Delphi ES20373 oxygen sensor features a heated design that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its 4-wire setup supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape is designed to fit securely with the vehicle’s wiring harness, minimizing the risk of disconnection or signal loss. With a thread size of 18 x 1.5 mm and an overall length of 525.0 mm, this sensor matches the original equipment specifications for Suzuki Esteem and Grand Vitara models, making it a reliable replacement part.

Common Applications and Problem Resolution

• Helps correct engine misfires caused by faulty oxygen sensor readings
• Reduces rough idling and poor acceleration linked to sensor failure
• Addresses increased emissions and failed emissions tests
• Improves fuel economy by providing accurate air-fuel mixture data
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Delphi ES20373 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct tools to remove the old sensor and avoid damaging the thread. Verify the square connector aligns properly with the vehicle’s wiring harness before securing. Follow the included instruction sheet for detailed installation guidance. Proper installation is critical for sensor performance and vehicle emission compliance.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet strict quality standards for durability and accuracy. The ES20373 part number undergoes rigorous testing to ensure reliable operation in Suzuki Esteem and Grand Vitara vehicles. While specific warranty details are not provided here, Delphi products typically come with manufacturer-backed warranties to protect against defects in materials and workmanship.