Mack recall: 2026–2027 Anthem an (4) and 1 more – service brakes
Mack Trucks, Inc. is recalling 2026–2027 Mack Anthem an (4), 2026–2027 Mack Pioneer PR (4) because of a crash risk – 850 vehicles (potentially affected). The recall report reached NHTSA on September 28, 2026. Distributed nationwide.
Lower risk A safety recall: the manufacturer or NHTSA found a vehicle defect that poses a risk to safety, or a failure to meet a federal safety standard. The remedy is free.
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| Product | 2026–2027 Mack Anthem an (4), 2026–2027 Mack Pioneer PR (4) |
| Brand | Mack |
| Company | Mack Trucks, Inc. |
| Type | Vehicles |
| Classification | Vehicle |
| Report received | September 28, 2026 |
| Published by NHTSA | September 28, 2026 |
| Quantity | 850 vehicles (potentially affected) |
| Recall ID | 26V620000 |
Vehicles in this recall
| Make | Model | Model years |
|---|---|---|
| Mack | Anthem an (4) | 2026–2027 |
| Mack | Pioneer PR (4) | 2026–2027 |
Identifiers and details
- NHTSA campaign number
- 26V620000
- Manufacturer recall number
- SC0500
- Component
- SERVICE BRAKES, ELECTRIC:SOFTWARE/PROGRAMMING
- Built
- 2025-02-24 to 2026-09-11
- Recalled part
- MSW · SOFTWARE · 26020191
- Initiated by
- Manufacturer
Why it was recalled
The problem: a crash risk.
NHTSA's defect summary: “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 consequence, according to NHTSA: “Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.”
What to do
NHTSA: “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.”
Enter your 17-character vehicle identification number (VIN) at nhtsa.gov/recalls or on the manufacturer's site to see whether your vehicle is included. Safety recall repairs are free at an authorized dealer, even if the vehicle is used or out of warranty.
Official notice: NHTSA recall 26V620000.
Other Mack recalls
| Date | Recall | Problem | Agency |
|---|---|---|---|
| Oct 1, 2026 |  Mack recall: 2026–2027 Anthem an (4) and 1 more – structureVehicles · 3,096 vehicles (potentially affected) | a crash risk Lower risk | NHTSA Vehicle |
Other vehicle recalls
| Date | Recall | Problem | Agency |
|---|---|---|---|
| Oct 9, 2026 | Lippert recall: Seating Power Cord – electrical systemVehicles · 4,435 units (potentially affected) | a fire risk Lower risk | NHTSA Equipment |
| Oct 9, 2026 | Grand Design recall: 2026–2027 Imagine – equipmentVehicles · 148 vehicles (potentially affected) | a crash risk Lower risk | NHTSA Vehicle |
| Oct 8, 2026 | Genesis recall: 2017–2020 G80 and 1 more – seatsVehicles · 94,622 vehicles (potentially affected) | a fire risk Most serious | NHTSA Vehicle |
| Oct 8, 2026 | Honda recall: 2023–2026 Accord Hybrid and 2 more – tiresVehicles · 4,804 vehicles (potentially affected) | an injury risk Lower risk | NHTSA Vehicle |
| Oct 8, 2026 | Tiffin recall: 2022–2025 Allegro Bus and 1 more – fuel systemVehicles · 177 vehicles (potentially affected) | a fire risk Lower risk | NHTSA Vehicle |
| Oct 7, 2026 | Toyota recall: 2026 RAV4 Plug-in Hybrid – engine and engine coolingVehicles · 30,978 vehicles (potentially affected) | a crash risk Serious | NHTSA Vehicle |
About this recall
Is Mack 2026–2027 Mack Anthem an (4), 2026–2027 Mack Pioneer PR (4) recalled?
Yes. Mack Trucks, Inc. reported the recall to NHTSA on September 28, 2026; NHTSA published it September 28, 2026 (Vehicle). Only the vehicles listed on this page are included.
Why was it recalled?
Because of a crash risk. 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.
What should I do if I have it?
NHTSA says: 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.
Where was it sold?
Nationwide.
More recalls
Source: recall records published by the U.S. Food and Drug Administration (openFDA Enforcement Reports), the USDA Food Safety and Inspection Service, the Consumer Product Safety Commission and the National Highway Traffic Safety Administration, collected twice a day. Product names, lot codes, dates and model numbers are shown exactly as the agency lists them; the agency's notice is the authority. 77.today is not affiliated with any of these agencies.