Mack Trucks Expands Availability of DEF Inducement Software Updates to Post-2010 Model Year Vehicles
GREENSBORO, NC (July 27, 2026) – Mack Trucks today announced the expanded rollout of updated diesel exhaust fluid (DEF) inducement software across its entire vehicle portfolio going back to post-2010 models, reinforcing the company’s commitment to helping customers maintain compliance while maximizing vehicle uptime.
Mack began incorporating the updated software in May 2026 on Mack Pioneer™ and all-new Mack Anthem® models equipped with the Mack® MP®13 engines and will have software updates available for all 2024 and newer vehicles by the end of the summer. Mack is also broadening availability of changes outlined in the Environmental Protection Agency’s (EPA) guidance document to include all post-2014 vehicles by the second quarter of 2027. By the end of 2027, owners of all eligible post-2010 vehicles that do not have remote software update capability will be able to receive the updated software through Mack dealers.
New EPA guidelines increase final inducement speeds from 5 miles per hour to 25 miles per hour and increase the repair window from four hours up to 160 hours. The software update aligns with current EPA guidance related to selective catalytic reduction (SCR) systems and DEF-related inducement strategies.
“Providing customers with practical solutions that support both compliance and operational efficiency remains a priority for Mack,” said Jonathan Randall, president of Mack Trucks North America. “By introducing this capability on new vehicles and establishing a clear path for legacy vehicle updates, we are helping customers maintain productivity while meeting evolving regulatory requirements.”
The updated software is designed to provide customers with a practical and streamlined path to compliance while supporting reliable vehicle operation. As Mack continues implementation across its product range, the company remains focused on delivering technology solutions that help fleets maximize uptime and operational performance.
Dedicated to durability, reliability and meeting the needs of customers, Mack
Trucks has provided purpose-built transportation solutions for more than 125 years. Today, Mack is one of North America’s largest producers of heavy-duty trucks, and
Mack® trucks are sold and serviced through an extensive distribution network in more than 45 countries. Mack trucks, diesel engines and transmissions sold in North America are assembled in the United States.
Mack manufacturing locations are certified to the internationally recognized ISO 9001 standard for quality, ISO 14001 standard for environmental management systems and ISO 45001 standard for health and safety management systems. Mack is also a proud sponsor of Share the Road, an American Trucking Associations public information campaign aimed at enhancing the safety of our nation's roadways.
Mack Trucks is part of the Volvo Group, which is driving prosperity through transport and infrastructure solutions, offering trucks, buses, construction equipment, power solutions for marine and industrial applications, financing and services that increase customer uptime and productivity. Founded in 1927, the Volvo Group is committed to shaping the future landscape of sustainable transport and infrastructure solutions. The Volvo Group is headquartered in Gothenburg, Sweden, employs about 100,000 people and serves customers in almost 180 markets. In 2025, net sales amounted to about $49 billion. For more information, please visit www.volvogroup.com.
NOTE TO EDITORS: This photo can be viewed and downloaded at https://press.macktrucks.com