Mack Pioneer/Anthem Recall: High Beam Headlight Failure
Mack recalls certain Pioneer and Anthem trucks due to automatic high beams that may not switch to low beam, increasing crash risk. Free OTA update available.
Use caution until it’s fixed
High beam headlights that do not switch to low beam as intended can reduce visibility for oncoming traffic, increasing the risk of a crash.
What happened, in plain English
Mack Trucks is recalling certain 2026 Anthem and 2025-2026 Pioneer vehicles because the automatic high beam (AHB) system may fail to switch to low beams as intended. This defect reduces visibility for oncoming traffic, which increases the risk of a crash. The issue causes these vehicles to fail Federal Motor Vehicle Safety Standard number 108 requirements. Read more at govinfonow.com/recall/1364726-mack-pioneer-anthem-recall-high-beam-headlight-failure.
Source Summary by GovInfoNow · govinfonow.com/recall/1364726-mack-pioneer-anthem-recall-high-beam-headlight-failure · Updated October 9, 2026 · Official notice: NHTSA #25V803000
Cite this page
“Mack Pioneer/Anthem Recall: High Beam Headlight Failure.” GovInfoNow, updated October 9, 2026. https://govinfonow.com/recall/1364726-mack-pioneer-anthem-recall-high-beam-headlight-failure. Based on NHTSA recall #25V803000 (https://www.nhtsa.gov/recalls?nhtsaId=25V803000).
Why it’s dangerous
The automatic high beams do not switch to low beam when they should. This keeps the headlights in a high-intensity state, which can dazzle or reduce visibility for drivers in oncoming traffic, thereby increasing the likelihood of a collision.
Who’s affected
Owners of specific 2026 Anthem and 2025-2026 Mack Pioneer trucks are affected. Drivers using the automatic high beam feature are most at risk, as their lights may remain on high beam, blinding other motorists.
How to tell if you have this one
You may have this vehicle if you own a 2026 Anthem (4) or a 2025-2026 Pioneer. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning November 27, 2025.
- Brand
Mack- Category
Vehicle
What to do — step by step
Check for Recall Notice
Owner letters regarding this recall were mailed on May 29, 2026.
Receive Software Update
Mack will update the vehicle software through an over-the-air (OTA) update to disable the AHB feature free of charge as an interim action.
Contact Customer Service
If you have questions, contact Mack's customer service at 1-800-866-1177 and reference recall number SC0488.
What NHTSA says to do
As an interim action, Mack will update the vehicle software through an over-the-air (OTA) update to disable the AHB feature, free of charge. Owner letters were mailed May 29, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0488. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning November 27, 2025.
How this recall unfolded
Recall timeline
Owners were mailed letters 6 months 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.
Keep exploring
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 #25V803000 (November 20, 2025)
- 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.