Welcome to the Navistar Supplier Network

The purpose of this website is to provide a responsive, secure environment within which Navistar and the Supply Chain can partner in innovation to achieve world-class material, cost, quality, and delivery performance.


We are dedicated to continuously improving this site. If you have comments, questions, or suggestions, please let us know by emailing us at

Suppliers interested in the new Navistar plant in Alabama, please complete the Alabama New Supplier Questionnaire and email If you have any questions, contact us at 331-332-5265.

For iSupplierPortal technical support and questions, please email

For Navistar Defense supplier information, see

For Supplier Scorecard questions or information, email