Delphi ES20321 Oxygen Sensor - Front or Rear

Delphi ES20321 Heated Oxygen Sensor Overview

The Delphi ES20321 is a heated oxygen sensor designed for precise emission control in select Chrysler, Dodge, Jeep, and Plymouth vehicles. This sensor features a 4-wire configuration and a round connector shape, ensuring reliable performance and compatibility with various engine management systems.

• Heated oxygen sensor for accurate exhaust gas monitoring
• 4-wire design for improved signal stability
• Round connector shape for secure electrical connection
• Thread size of 18 x 1.5 mm for proper fitment
• Overall length of 325.0 mm to match OEM specifications
• Includes oxygen sensor and instruction sheet
• Compatible with front and rear positions depending on vehicle model

Technical Details and Compatibility

The Delphi ES20321 oxygen sensor is engineered to meet the specific requirements of emission control systems in a range of Chrysler, Dodge, Jeep, and Plymouth models. Its heated sensor type allows for faster warm-up times, improving fuel efficiency and reducing emissions. The 4-wire configuration supports both the sensor heater circuit and signal output, enhancing responsiveness and durability. The round connector shape and 18 x 1.5 mm thread size ensure a secure and precise installation. With an overall length of 325.0 mm, this sensor fits correctly in designated front or rear positions, depending on the vehicle's design.

Compatible Vehicles

This oxygen sensor is compatible with the following makes and models:

• Chrysler 300M, Cirrus, Concorde, Intrepid, LHS, Sebring, Stratus, Town & Country, Voyager
• Dodge B1500, B2500, B3500, Caravan, Dakota, Durango, Neon
• Jeep Cherokee, Grand Cherokee, Wrangler
• Plymouth Breeze, Prowler, Grand Voyager

Common Applications and Issues Addressed

• Helps maintain optimal air-fuel ratio for efficient combustion
• Reduces harmful emissions by providing accurate oxygen level data
• Prevents engine performance issues related to faulty oxygen sensors
• Supports proper operation of catalytic converters
• Resolves check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Delphi ES20321 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the correct socket size for the 18 x 1.5 mm thread to prevent damage. Verify the sensor position (front or rear) according to your vehicle’s service manual. Connect the 4-wire harness securely to avoid electrical issues. Follow the included instruction sheet for detailed installation guidance.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES20321 part number undergoes rigorous testing to ensure reliable operation under various driving conditions. This product typically includes a limited warranty covering defects in materials and workmanship. Refer to Delphi’s official warranty policy for specific terms and conditions.