Recall 26V620000: 2026–2027 Mack Anthem AN (4), 2026–2027 Mack Pioneer PR (4)

Updated from NHTSA data · How we count

Report date
Sep 28, 2026
Vehicles affected
850
Models
2
Initiated by
Manufacturer

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.

The fix

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 vehicles

Details

NHTSA campaign
26V620000
Manufacturer campaign
SC0500
Manufacturer
Mack Trucks, Inc.
Components
Service brakes, electric:software/programming (Brakes)

Recall repairs are free at authorized dealers. To see if your vehicle is included, enter your VIN at NHTSA.gov or call the manufacturer.

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. Methodology