Mack and Volvo Recalled 1,242 Tanker Trucks
Owners of select 2025-2027 tractor models should check for software defects that cause braking issues.
Updated on Oct. 2, 2026 in Trucks
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Mack Trucks and Volvo Trucks North America have recalled a combined 1,242 tractor units due to a software defect that calculates axle loads incorrectly. This error can reduce braking performance while hauling smoothbore tanker trailers, increasing the risk of a crash.
Why it matters
The software glitch creates a significant safety risk by impeding the vehicle's ability to stop effectively when pulling specific tanker configurations. Proper axle load estimation is critical for balanced braking, and these inaccuracies undermine vehicle safety systems.
The recall affects 850 Mack Anthem and Pioneer tractors from model years 2026-2027, along with 392 Volvo VNL and VNR tractors from model years 2025-2027. All involved units are equipped with a tanker application package.
The players
Mack Trucks
A major manufacturer of heavy-duty trucks known for their long-haul Anthem and vocational Pioneer product lines.
Volvo Trucks North America
A subsidiary of the global Volvo Group that produces heavy-duty Class 8 trucks for the North American market.
National Highway Traffic Safety Administration
The federal agency tasked with setting safety standards and managing automotive recalls in the United States.
The details
The defect occurs because the vehicle software generates inaccurate axle load calculations during operation. This discrepancy specifically impacts braking performance when the trucks are transporting smoothbore tanker trailers. To remedy the issue, dealers will install updated software that disables the problematic dynamic trailer braking calculations free of charge.
Timeline
October 5, 2026: VINs become searchable on the NHTSA website.
November 27, 2026: Volvo plans to begin mailing owner notification letters.
The Home Front
The automotive industry is increasingly managing complex safety-related software updates as vehicles become more digitized. This recall aligns with standard oversight requirements under the National Traffic and Motor Vehicle Safety Act to address potential performance failures.
Owners should check their specific VIN starting October 5, 2026, using the official federal lookup tool. If your vehicle is included, contact an authorized service center to schedule the required software update.
The takeaway
Reliable braking performance is essential for heavy vehicle operation and public road safety. Owners can reach Mack customer service at 1-800-866-1177 or Volvo customer service at 800-528-6586 to confirm their vehicle status and schedule the necessary repair.
Further reading
For more on industry safety standards and vehicle maintenance, visit Trucks.
More information
You can verify if your vehicle is included in this safety campaign through the NHTSA vehicle recall lookup tool.
Source note: This article includes information reported by The BRAKE Report.
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