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.
Compare the exact product and every lot, model, serial range or date listed in the official notice. A similar name alone does not establish that your product is included.
Identifiers in this source record
2026 MACK ANTHEM AN (4)Manufacturer campaign: SC0500Part: 260201912026 MACK PIONEER PR (4)2027 MACK ANTHEM AN (4)2027 MACK PIONEER PR (4)Vehicle: VIN plus the year, make and model. Car seat or equipment: Manufacturer, model and production date from the label. Tire: Brand, tire line, size and DOT tire identification number.
Read the vehicles identification guideWhy this notice was issued
Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.
Official action
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.
Follow the specific instructions and use the contact details in the announcement if you need help confirming a match or arranging the remedy.
Read the full official instructionsProduct & source details
- Product
- 2026 MACK ANTHEM AN (4)
- Brand or manufacturer
- MACK
- Source
- NHTSA
- Notice type
- Recall
- Source reference
- 26V620000
- Category
- Vehicles & road safety