Delphi ES10227 Oxygen Sensor

Delphi ES10227 Oxygen Sensor Overview

The Delphi ES10227 is a non-heated upstream oxygen sensor built for older import and domestic applications that use a 1-wire design and a round connector. It is a direct-fit emission control sensor for vehicles such as Mitsubishi Galant, Dodge Ram 50, and Hyundai Excel applications that call for a 505.0 mm overall length.

Key Features

• Non-heated oxygen sensor design
• 1-wire configuration with round connector shape
• 18 x 1.5 mm thread size for the specified applications
• 505.0 mm overall length
• Upstream position
• Includes oxygen sensor and instruction sheet
• OE-backed engineering from Delphi, drawing on more than 100 years of original equipment experience

Detailed Description

Delphi ES10227 is an upstream oxygen sensor for emission control systems that require a non-heated, single-wire sensor with a round connector. It is listed for a wide range of 1985-1993 vehicles, including Mitsubishi Galant, Mitsubishi Montero, Mitsubishi Mighty Max, Dodge Caravan, Dodge Ram 50, Hyundai Excel, and Chrysler Conquest applications. This part number, ES10227, is built with Delphi’s OE heritage and manufacturing knowledge to match the fit and function expected in the original application.

This part cross-references Bosch 12031 and Walker Products 250-21005 for the same application.

What It Helps Address

• Check engine light caused by a failing upstream oxygen sensor
• Incorrect air-fuel mixture readings
• Rough idle related to inaccurate exhaust oxygen feedback
• Reduced fuel economy from a worn sensor
• Emission test failures tied to sensor response issues

Installation Notes and Tips

Verify the vehicle’s original sensor uses a non-heated, 1-wire layout with a round connector and 505.0 mm overall length before ordering. Confirm the 18 x 1.5 mm thread size and upstream location match the existing part. For fitment examples, this sensor fits 1985-1989 Mitsubishi Montero, upstream; fits 1985-1989 Dodge Ram 50, upstream; and fits 1988-1989 Hyundai Excel, upstream. Additional listed applications include 1989-1992 Mitsubishi Galant, 1987-1989 Chrysler Conquest, and 1985-1987 Plymouth Voyager, all with the specified 505.0 mm overall length.

Quality Assurance

Delphi builds this oxygen sensor using OE experience and supplier knowledge developed through work with major automakers. That background is reflected in the ES10227’s application-specific design and emission-system fitment focus.