Mack Pioneer and Anthem Recall: Brake System Failure Risk
Mack recalls certain 2025-2027 Pioneer (4) and 2026-2027 Anthem trucks due to rear brake modulator defects that can cause loss of ABS and stability control.
Stop using this now
A loss of anti-lock brakes and electronic stability control increases the risk of a crash or injury.
What happened, in plain English
Mack Trucks is recalling certain 2025-2027 Pioneer (4) and 2026-2027 Anthem vehicles because the rear brake modulators may have unprotected electrical connectors. These connectors can short circuit, leading to a loss of the anti-lock brake system (ABS) and electronic stability control (ESC). This defect increases the risk of a crash or injury. Read more at govinfonow.com/recall/1364729-mack-pioneer-and-anthem-recall-brake-system-failure-risk.
Source Summary by GovInfoNow · govinfonow.com/recall/1364729-mack-pioneer-and-anthem-recall-brake-system-failure-risk · Updated October 9, 2026 · Official notice: NHTSA #26V261000
Cite this page
“Mack Pioneer and Anthem Recall: Brake System Failure Risk.” GovInfoNow, updated October 9, 2026. https://govinfonow.com/recall/1364729-mack-pioneer-and-anthem-recall-brake-system-failure-risk. Based on NHTSA recall #26V261000 (https://www.nhtsa.gov/recalls?nhtsaId=26V261000).
Why it’s dangerous
The rear brake modulators in these vehicles may have electrical connectors that lack protection. If these unprotected connectors short circuit, it can disable the anti-lock brake system and electronic stability control. Losing these systems while driving increases the likelihood of losing control or crashing.
Who’s affected
Owners of specific 2025-2027 Mack Pioneer (4) and 2026-2027 Mack Anthem (4) trucks are affected. Drivers are at risk because the vehicle may lose critical braking assistance systems without warning.
How to tell if you have this one
This recall applies to 2025-2027 Pioneer (4) and 2026-2027 Anthem vehicles manufactured by Mack Trucks, Inc. You can determine if your vehicle is included by searching for its Vehicle Identification Number (VIN) on NHTSA.gov starting April 30, 2026.
- Brand
Mack- Category
Vehicle
What to do — step by step
Check Your Eligibility
Search your Vehicle Identification Number (VIN) on NHTSA.gov to see if your truck is part of this recall.
Contact A Dealer
Schedule an appointment with a Mack dealer to have the rear brake modulator electrical connectors inspected and repaired free of charge.
Call Customer Service
If you need more information, contact Mack's customer service at 1-800-866-1177 using recall number SC0494.
What NHTSA says to do
Dealers will inspect the rear brake modulator electrical connectors, install a protective cover, and replace the rear brake modulators, as necessary, free of charge. Owner notification letters were mailed June 8, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0494. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning April 30, 2026.
How this recall unfolded
Recall timeline
Owners were mailed letters 46 days after NHTSA received the defect report.
- NHTSA received the defect report
- Owner letters mailed
- 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 #26V261000 (April 23, 2026)
- Plain-language summary written by qwen3.6:35b-a3b on October 9, 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.