Mack Anthem (2025) Engine Recall: Detached Gear Risk
Mack recalls 2025 Anthem trucks with potentially loose idler gear brackets that could cause engine stalls and crashes. Owners must contact dealers for free repairs by April 24, 2025.
Use caution until it’s fixed
A detached idler gear can damage the engine, resulting in a stall and increasing the risk of a crash or injury.
What happened, in plain English
Mack is recalling certain 2025 Anthem trucks because the idler gear bracket fasteners might be improperly tightened, causing the gear to detach. This could lead to engine stalls and increase crash risk. Affected owners should contact dealers for free repairs. Read more at govinfonow.com/recall/1342256-mack-anthem-2025-engine-recall-detached-gear-risk.
Source Summary by GovInfoNow · govinfonow.com/recall/1342256-mack-anthem-2025-engine-recall-detached-gear-risk · Updated October 8, 2026 · Official notice: NHTSA #25V256000
Cite this page
“Mack Anthem (2025) Engine Recall: Detached Gear Risk.” GovInfoNow, updated October 8, 2026. https://govinfonow.com/recall/1342256-mack-anthem-2025-engine-recall-detached-gear-risk. Based on NHTSA recall #25V256000 (https://www.nhtsa.gov/recalls?nhtsaId=25V256000).
Why it’s dangerous
The idler gear bracket fasteners may not be tightened properly, allowing the gear to detach from the engine. This can cause the engine to stall while driving, potentially leading to a crash or injury.
Who’s affected
Owners of 2025 Mack Anthem (AN) trucks are affected. Drivers using these trucks without the fix face the highest risk of engine stalls and crashes.
How to tell if you have this one
Check if your 2025 Anthem (AN) truck has the idler gear bracket fasteners that may be improperly tightened. The recall applies to all 2025 Anthem models.
- Brand
Mack- Category
Vehicle
What to do — step by step
Contact Dealer for Repair
Dealers will inspect and replace the turbo compound units for free if needed.
April 24, 2025Check for Notification Letter
Owner notification letters are expected to be mailed by April 24, 2025.
April 24, 2025
What NHTSA says to do
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.
How this recall unfolded
Recall timeline
3 dated steps over 18 months.
- NHTSA received the defect report
- Owner letters expected (expected, per the notice)
- Added to GovInfoNow
Dates from the agency record only; steps without a date are left out.
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Where this comes from
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
- Official source: NHTSA Recall #25V256000 (April 17, 2025)
- Plain-language summary written by qwen3:4b on October 8, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
- GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.