Delphi ES20044 Oxygen Sensor

Delphi ES20044 Oxygen Sensor Overview

The Delphi ES20044 is a heated oxygen sensor built for precise exhaust monitoring in a wide range of Chrysler, Dodge, Jeep, and Plymouth applications. With OE heritage from a supplier to major automakers, this sensor is engineered to match the demands of front and rear sensor locations where accurate air-fuel feedback matters.

Compatible With 1995-2001 Dodge Ram 1500, 1996-2000 Jeep Cherokee, and other listed applications, the Delphi ES20044 supports direct replacement needs for vehicles using a 4-wire heated sensor design.

Key Features

• Heated oxygen sensor design for faster operating temperature and stable signal output
• 4-wire configuration for common OE-style exhaust sensor applications
• Round connector shape for vehicle-specific harness connections
• 18 x 1.5 mm thread size for proper exhaust bung fitment
• Overall length of 375.0 for listed applications
• Package includes the oxygen sensor and instruction sheet
• Position coverage includes front, front left, front right, left, and rear applications where specified

Detailed Description

Delphi ES20044 is an emission control oxygen sensor designed for direct-fit replacement in many Chrysler, Dodge, Jeep, and Plymouth vehicles. It is a heated sensor, which helps it reach operating temperature quickly so the engine control system can receive exhaust feedback sooner after startup. That makes it a practical choice for maintaining proper fuel control and emissions performance on vehicles such as the Dodge Ram 1500, Jeep Cherokee, and Dodge Dakota.

This part number, ES20044, cross-references Bosch 13100 and DENSO Auto Parts 234-4077 for the same application. The Delphi ES20044 also reflects Delphi’s OE-focused manufacturing background, bringing factory-style engineering to aftermarket replacement needs.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn upstream or downstream sensor
• Slow sensor response during cold starts
• Emissions test failures tied to faulty exhaust feedback
• Rough idle or drivability issues caused by inaccurate oxygen sensor data

Installation Notes and Tips

Verify the exact position on your vehicle before ordering, since ES20044 is listed for front, front left, front right, left, and rear locations depending on application. Confirm the connector shape, wire count, and thread size against the original sensor before installation. For fitment examples, this part fits 2000-2001 Dodge Ram 1500, front; fits 2000-2001 Jeep Cherokee, front; and fits 2000 Jeep Wrangler, rear.

Use the vehicle application details to match the correct sensor location, especially on models with California Emission System notes or pigtail-length differences.

Quality Assurance

Delphi draws on more than 100 years of OE experience and supplier knowledge from major automaker programs. That OE heritage is built into the ES20044 oxygen sensor to support consistent replacement quality for emission control service.