Delphi ES20091 Oxygen Sensor - Front or Front Left

Delphi ES20091 Heated Oxygen Sensor Overview

The Delphi ES20091 is a heated oxygen sensor designed for precise emission control in select Dodge and Jeep vehicles. Engineered to provide accurate air-fuel mixture readings, this sensor supports optimal engine performance and reduced emissions.

• Heated sensor type for faster warm-up and improved efficiency
• 4-wire configuration ensuring reliable electrical connections
• Square connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified vehicle models
• Overall length of 300.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Positioned for front or front left placement depending on vehicle

Detailed Product Description

The Delphi ES20091 oxygen sensor is a heated type sensor featuring a 4-wire design that allows for quicker sensor activation and more accurate readings of exhaust oxygen levels. Its square connector shape ensures a secure electrical connection, minimizing the risk of signal loss or corrosion. The sensor’s thread size of 18 x 1.5 mm and overall length of 300.0 mm are engineered to fit specific mounting locations on Dodge Dakota, Dodge Durango, Jeep Grand Cherokee, and Ram 1500 models. This sensor is typically installed in the front or front left position, but exact placement should be verified based on the vehicle’s specifications. The package includes the oxygen sensor itself along with an instruction sheet to assist with proper installation.

Compatible Vehicles and Applications

• Dodge Dakota
• Dodge Durango
• Jeep Grand Cherokee
• Ram 1500

This oxygen sensor is designed to maintain proper engine air-fuel ratios, which is critical for emission control systems and fuel efficiency in these vehicles.

Common Issues Addressed by Delphi ES20091

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture
• Increased emissions failing regulatory standards
• Engine performance issues such as rough idling or hesitation
• Failed emissions tests related to sensor malfunction

Installation Notes and Tips

Before installation, verify the sensor position on your specific vehicle model to ensure correct placement (front or front left). Use proper tools to avoid damaging the sensor threads (18 x 1.5 mm). The heated sensor design requires a 4-wire connection; ensure the square connector is fully seated to maintain signal integrity. Follow the included instruction sheet carefully for torque specifications and wiring procedures. It is recommended to inspect the wiring harness and connector for corrosion or damage prior to installation.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM specifications for durability and performance. The ES20091 part number undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects. Consult product documentation or your supplier for exact warranty terms.