NHTSA campaign 25V256000 · Mack campaign SC0477
Mack Recall 25V-256: Idler Gear May Detach Causing Engine Stall
NHTSA recall 25V256000 (Mack campaign SC0477) was reported by Mack Trucks, Inc. on April 17, 2025, with 3 vehicles potentially affected (per NHTSA). NHTSA's record lists the Mack ANTHEM (AN) for the 2025 model year. Owners were notified on April 24, 2025, per NHTSA.
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 25V256000 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
- 25V256000 (also written 25V-256 or 25V256)
- Filed by
- Mack Trucks, Inc.
- Mack campaign number
- SC0477
- Report received
- Potentially affected
- 3 vehicles (per NHTSA)
- Component
- Engine and Engine Cooling — Engine — Diesel
- Owners notified
Repair completion: 100% (latest rate the manufacturer reported to NHTSA; 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 25V256000. 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)
- 2025 · Vehicles built September 24, 2024 – October 24, 2024 (per NHTSA)
NHTSA's recall notice
As NHTSA's recall record states it for campaign 25V256000.
Defect description
Mack Trucks, Inc. (Mack) is recalling certain 2025 Anthem (AN) vehicles. The idler gear bracket fasteners may have been improperly tightened, allowing the idler gear to detach from the engine.
Safety consequence
A detached idler gear can damage the engine, resulting in a stall and increasing the risk of a crash or injury.
Manufacturer remedy
Dealers will inspect and replace the turbo compound units as necessary, free of charge. Owner notification letters are expected to be mailed April 24, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0477.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 888-327-4236 (TTY 888-275-9171) or go to nhtsa.gov.
Sources
Official NHTSA notice for recall 25V256000
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.