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This is a historical safety record. The campaign may no longer be active.

NHTSA : 26V620000🔴 ⚠️ High severity

Campaign Details

Component: SERVICE BRAKES, ELECTRIC:SOFTWARE/PROGRAMMING

Defect Description

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 / Hazard

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

Proposed Solution

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.

🚗 Affected Vehicles3

All the models below were recalled for this exact same problem.