Discovering your parts number with ESN, GSN, ATSN, and OEM numbers is made easy through the Cummins parts website: https://parts.cummins.com/home. This comprehensive online catalog is dedicated to providing genuine details for Holset®, Fleetguard®, Onan, and Cummins parts. It includes individual graphics, dimensions, and alternative options, all accessible at no charge and without the need for registration.

To assist you in this process, here are some helpful tips:

1. Locating your Engine Serial Number (ESN): For detailed guidance on finding your ESN, refer to the icon on the left side of the ESN search bar on the Engine Parts page. This resource offers various methods to identify your ESN.
2. Locating your Generator Serial Number (GSN): Find information on finding your GSN by accessing the icon on the left side of the GSN search bar on the Power Generation page. This resource provides different ways to locate your GSN.
3. Locating your Aftertreatment Serial Number (ATSN): For guidance on finding your ATSN or part number, access information through the icon on the left side of the search bar on the Emission Solutions page.
4. Finding an overhaul/repair kit for your engine: If an overhaul/repair kit is available for your ESN (engine serial number), it will be visible in the Parts Catalog. Start by clicking on Engine Parts from the home page, enter your ESN in the search field, and click the magnifying glass icon. Once the ESN information loads, click on the Parts Catalog – System View link on the left-hand menu. The Overhaul Kit selection will be at the bottom of the System View list. If there’s no overhaul kit selection, you can find information on overhaul/repair kits on the QuickServe Online website (quickserve.cummins.com) under the Products tab. For heavy-duty engines, click on “Cummins Overhaul Program,” and for midrange engines, click on “MidRange Overhaul Kit Program.” Scroll to the bottom of the respective pages for detailed overhaul kit information.