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NHTSA Campaign 26V620000

SERVICE BRAKES, ELECTRIC:SOFTWARE/PROGRAMMING

Issued by Mack Trucks, Inc. · Reported Sep 28, 2026 · 850 vehicles affected

What's wrong

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.

Consequence

Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.

Remedy

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.

Vehicles affected by this recall

Make Model Year Units
MACK ANTHEM AN (4) 2026 850
MACK ANTHEM AN (4) 2027 850
MACK PIONEER PR (4) 2026 850
MACK PIONEER PR (4) 2027 850

Source: NHTSA Campaign 26V620000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.