NAVISTAR’S PARTSMART PARTS NOW HONORS TAX-EXEMPT PURCHASES ONLINE

WARRENVILLE, Ill. (May 28, 2010) – Tax-exempt customers now have the ability to purchase Navistar’s PARTSMART Parts online without a tax penalty. New functionality within the website’s checkout process allows companies and agencies with tax-exempt status to make purchases easily.

"This new opportunity within the partsmartparts.com website opens up e-commerce to a wider segment of customers, said Kim Speciale, senior marketing manager for Navistar Parts. "With a simple form to fax, a tax-exempt customer can establish themselves with Navistar Parts as a tax-exempt customer and save on their parts purchases."

Tax-exempt customers include fleets that transport over state lines, resellers, government agencies and nonprofits.

Within the e-commerce process, tax-exempt organizations are prompted to complete a tax-exempt form. This form, and proof of tax-exempt status, will be used to change the customer’s profile within the partsmartparts.com site, and will automatically eliminate sales tax from all e-commerce purchases. State tax exempt status is required; federal tax-exempt status are not accepted.

"The tax-exempt functionality makes e-commerce for truck and bus parts more accessible to a greater percentage of our customers," said Patti Corso, e-Commerce Catalog Manager for Navistar Parts. "This one-time process will open a growing selection of online parts ordering to new customers throughout the United States."

About Navistar Parts

Navistar® Parts, an operating unit of Navistar, Inc. (NYSE: NAV), delivers the right part, at the right place, at the right time. With the largest dealer network in North America, and extensive global locations, Navistar Parts supplies parts worldwide for International® and IC Bus™ brand vehicles and MaxxForce® brand diesel engines, as well as parts for all makes of medium- and heavy-duty trucks. With more than 700,000 parts, 10 global Parts Distribution Centers and 100 years of building a solid aftermarket parts supply chain, Navistar Parts keeps you up and running. Navistar Parts private labels include: International, PΛRTSMΛRT® and ReNEWed® brands. Additional information on Navistar Parts can be found at www.navistarpartsandservice.com.

About Navistar

Navistar® International Corporation (NYSE: NAV) is a holding company whose subsidiaries and affiliates produce International® brand commercial and military trucks, MaxxForce® brand diesel engines, IC Bus™ brand school and commercial buses, Monaco RV brands of recreational vehicles, and Workhorse® brand chassis for motor homes and step vans. It also is a private-label designer and manufacturer of diesel engines for the pickup truck, van and SUV markets. The company also provides truck and diesel engine service parts. Another affiliate offers financing services. Additional information is available at www.Navistar.com/newsroom.

All marks are trademarks of their respective owners.

Media contacts: Kim Speciale, 630-753-6082 – Laura McGowan, 630-863-8709
Investor contact: Heather Kos, 630-753-2406
Website: www.Navistar.com/newsroom