NHTSA campaign 26V509000 · Mack campaign SC0497
Mack Recall 26V-509: Steering Gearbox Fasteners May Loosen
NHTSA recall 26V509000 (Mack campaign SC0497) was reported by Mack Trucks, Inc. on August 6, 2026, with 341 vehicles potentially affected (per NHTSA). NHTSA's record lists the Mack TERRAPRO (TE) for the 2025 model year.
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 26V509000 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
- 26V509000 (also written 26V-509 or 26V509)
- Filed by
- Mack Trucks, Inc.
- Mack campaign number
- SC0497
- Report received
- Potentially affected
- 341 vehicles (per NHTSA)
- Component
- Steering — Critical Fasteners
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 26V509000. 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 TERRAPRO (TE)
- 2025 · Vehicles built October 2, 2024 – December 20, 2024 (per NHTSA)
NHTSA's recall notice
As NHTSA's recall record states it for campaign 26V509000.
Defect description
Mack Trucks, Inc. (Mack) is recalling certain 2025 TerraPro trucks. The steering gearbox fasteners may loosen.
Safety consequence
A loose steering gearbox can result in a loss of steering, increasing the risk of a crash.
Manufacturer remedy
Dealers will inspect and tightened or replace the fasteners as necessary, free of charge. Interim letters notifying owners of the safety risk were mailed September 21, 2026. Additional letters will be sent once the final remedy is available. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0497.
Sources
Official NHTSA notice for recall 26V509000
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.