Mack Recall 26V620000: Service Brakes, Electric, Software/programming

NHTSA recall 26V620000 · announced September 28, 2026 · filed by Mack Trucks, Inc. · 850 units affected

The problem

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.

The risk

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.

Official NHTSA recall notice →

Vehicles covered by this recall

• 2026 Mack Anthem An (4)
• 2027 Mack Anthem An (4)
• 2026 Mack Pioneer Pr (4)
• 2027 Mack Pioneer Pr (4)

Source: National Highway Traffic Safety Administration public recall data. This page reports official records and is not legal, medical, or repair advice.