United States2026–2027 Anthem AN (4) and Pioneer PR (4) vehicles equipped with a tanker application package are affected; involved VINs will be searchable on NHTSA.gov on October 5, 2026 (NHTSA campaign 26V620000, manufacturer campaign SC0500). The recall is for inaccurate axle load calculations that may cause reduced braking performance while transporting smoothbore tanker trailers, increasing stopping distance and crash risk. Dealers will install new software to disable the dynamic trailer braking calculations free of charge; owner letters are expected November 27, 2026 and Mack can be contacted at 1-800-866-1177.
What's being recalled
Mack Trucks, Inc. (Mack) is recalling certain 2026-2027 Anthem AN (4) and Pioneer PR (4) vehicles equipped with a tanker application package. Inaccurate axle load calculations may cause reduced braking performance while transporting smoothbore tanker trailers.
How to identify it
NHTSA campaign 26V620000; Manufacturer campaign SC0500
The hazard
Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.
What to do
Dealers will install new software to disable the dynamic trailer braking calculations, free of charge. Owner notification letters are expected to be mailed November 27, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0500. Vehicle Identification Numbers (VINs) involved in this recall will become searchable on NHTSA.gov on October 5, 2026.
The official notice
This page is a summary of the notice published by U.S. National Highway Traffic Safety Administration, collected from U.S. National Highway Traffic Safety Administration. Check the original before you act on it.
Read the official notice (opens in a new tab)