Delphi ES20154 Oxygen Sensor - Front or Rear

Delphi ES20154 Oxygen Sensor Overview

The Delphi ES20154 is a heated oxygen sensor built for precise exhaust monitoring and OE-style replacement performance. With Delphi’s OE heritage and supplier experience behind it, this sensor is engineered for direct-fit service on select Chevrolet Aveo, Chevrolet Aveo5, and Mitsubishi Montero Sport applications.

Compatible With 2006-2008 Chevrolet Aveo rear, 2007-2008 Chevrolet Aveo5 rear, and 1997-2000 Mitsubishi Montero Sport front without California Emission System.

Key Features

• Heated oxygen sensor design for faster operating temperature
• 4-wire configuration for the specified vehicle applications
• Square connector shape for OE-style electrical connection
• 18 x 1.5 mm thread size for proper exhaust bung fitment
• 350.0 overall length for application-specific routing
• Package includes the oxygen sensor and instruction sheet
• Position coverage includes front and rear applications as listed

Detailed Description

Delphi ES20154 is an emission control sensor designed to monitor exhaust oxygen content and support accurate fuel control in the engine management system. This part number is used across select rear sensor applications on the Chevrolet Aveo and Chevrolet Aveo5, as well as front sensor service on the Mitsubishi Montero Sport without California Emission System. This part cross-references Bosch 15149 and NTK 25190 for the same application.

Built from Delphi’s OE experience, the ES20154 follows the fitment and connector requirements needed for direct replacement service. If you are searching for a Delphi ES20154 oxygen sensor for a 2006-2008 Chevrolet Aveo rear or a 1997-2000 Mitsubishi Montero Sport front, this listing matches the confirmed vehicle coverage.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn sensor
• Slow sensor response during closed-loop operation
• Emissions test failures tied to sensor output issues
• Rough fuel control caused by degraded exhaust feedback

Installation Notes and Tips

Verify the sensor position before installation, since this part is listed for front and rear locations depending on vehicle application. Confirm the connector shape, 4-wire layout, and 18 x 1.5 mm thread size match the original sensor before removal. For the Mitsubishi Montero Sport, confirm the vehicle is without California Emission System. Follow the included instruction sheet and route the harness to avoid exhaust heat and moving components.

Quality Assurance

Delphi builds this oxygen sensor using OE-based engineering knowledge developed through long-term supplier experience with major automakers. The ES20154 is intended to meet the fitment and functional requirements of the listed applications.