NHTSA campaign 26V620000 · Mack campaign SC0500
Mack Recall 26V-620: Software Calculation Error May Cause Reduced Braking Performance
NHTSA recall 26V620000 (Mack campaign SC0500) was reported by Mack Trucks, Inc. on September 28, 2026, with 850 vehicles potentially affected (per NHTSA). NHTSA's record lists the Mack ANTHEM AN (4) and Mack PIONEER PR (4) for model years 2026–2027.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 26V620000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 26V620000 (also written 26V-620 or 26V620)
- Filed by
- Mack Trucks, Inc.
- Mack campaign number
- SC0500
- Report received
- Potentially affected
- 850 vehicles (per NHTSA)
- Component
- Service Brakes, Electric — Software/Programming
Completion not yet reported (dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 26V620000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
Mack
Mack ANTHEM AN (4)
Mack PIONEER PR (4)
NHTSA's recall notice
As NHTSA's recall record states it for campaign 26V620000.
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.
Safety consequence
Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.
Manufacturer remedy
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.
Sources
Official NHTSA notice for recall 26V620000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.