Mack Trucks, Inc. — Software Calculation Error May Cause Reduced Braking Performance

Check whether your vehicle is affected and follow the manufacturer’s recall instructions — the repair is free.

What’s wrong

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

The Recall Registry rates this worth checking — we found nothing in the notice describing a specific injury. A recall covers only the versions, UPCs or date codes it names, so check those against yours.

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.

Who to contact: 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 product

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.

Details

Units affected: 850
Recall date: September 28, 2026
Brand: Mack Trucks, Inc.

Model, lot or SKU numbers

The official notice

This recall was issued by the National Highway Traffic Safety Administration. The Recall Registry summarises it — always confirm the details at the source.

Their exact wording: “Mack Trucks, Inc. — Software Calculation Error May Cause Reduced Braking Performance”

Read it on NHTSA →

Worried about the other things in your house? You can write down what you have and be told if one is recalled — or, if you sell second-hand, check your whole stock at once.

Filed under: Cars & vehicles

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