Mack Anthem An (4), Mack Pioneer Pr (4), model years 2025 to 2026. Filed by Mack Trucks, Inc. and reported to NHTSA on 20 November 2025. 247 vehicles potentially affected.
What the notice says Mack Trucks, Inc. (Mack) is recalling certain 2026 Anthem (4) and 2025-2026 Pioneer vehicles. The automatic high beams (AHB) may not switch to low beam headlights as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, …
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
Mack's own number for this recall: SC0488. That is the number on the owner letter and on the dealer paperwork. 25V803 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 25V803 cover?
- Mack Anthem An (4), Mack Pioneer PR (4), model years 2025-2026.
- What is wrong with them?
- Mack Trucks, Inc. (Mack) is recalling certain 2026 Anthem (4) and 2025-2026 Pioneer vehicles. The automatic high beams (AHB) may not switch to low beam headlights as intended.
- What can happen if it is not put right?
- High beam headlights that do not switch to low beam as intended can reduce visibility for oncoming traffic, increasing the risk of a crash.
- Is there a fix yet?
- Yes, and it is free. 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.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. Mack calls this recall SC0488, which is the number on the owner letter and the dealer paperwork.
Answered from the register this site holds. NHTSA is the record to act on.
What the authority says can happen if this is not 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.”
affected
in the notice
caught
| Campaign | 25V803 |
|---|---|
| Filed by | Mack Trucks, Inc. |
| System at fault | Exterior Lighting:Lighting Control Module:Software |
| Reported to NHTSA | 20 November 2025 |
| Model years | 2025-2026 |
| Vehicles named | MACK ANTHEM AN (4), MACK PIONEER PR (4) |
What the notice says today
The defect
Mack Trucks, Inc. (Mack) is recalling certain 2026 Anthem (4) and 2025-2026 Pioneer vehicles. The automatic high beams (AHB) may not switch to low beam headlights as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
The consequence
High beam headlights that do not switch to low beam as intended can reduce visibility for oncoming traffic, increasing the risk of a crash.
The remedy
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.
What it said before
Nothing has changed while we have been watching. We last read the wording of this campaign on 17 September 2026, and it matched the copy we already held.
That copy hashes to e07232825c5f6ce401ad0c122ce8e6f5…, so if it is ever edited the change is provable rather than a matter of memory.
This is one of 663 notices in the record whose component field names exterior lighting. Across that group the median wait before owners were written to was 43 days.
Last checked . No change has been recorded in the wording.
The same recall in other countries
This campaign carries a manufacturer code that also appears in another country’s register, which means the same defect was recalled there too.
- Canada: Transport Canada recall 2025640, recorded 20 November 2025 (within a week of the American filing)
Matched on SC0488, the manufacturer’s own number for this campaign, which is the only field the registers share. Exact match, nothing paired on brand and date. The two dates are adjacent instruments rather than the same one, so a difference of a day or two means nothing.
How often the two countries file on the same day · The European alerts
The models named here, across their whole recall history
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 25V803, wording as read on 17 September 2026. https://carsmultiverse.com/recall/25v803/
The copy quoted above hashes to e07232825c5f6ce401ad0c122ce8e6f5…. If the notice is reworded later, that fingerprint will not match, which is how a reader checks that the quotation was of the version we say it was.
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
Other Mack notices we hold
- 26V515: 2027 Anthem AN (4) and Pioneer PR (4)
- 26V509: 2025 TerraPro trucks
- 26V351: 2026 Anthem (AN), 2026-2027 Pioneer PR (4), Pinnacle (PI/PN), Granite (GR), and 2027 Anthem AN (4)
- 26V261: 2025-2027 Pioneer (4) and 2026-2027 Anthem (4)
- 26V207: 2025-2027 Pioneer (4) and 2027 Anthem (4) trailers
- 26V139: 2022-2027 TerraPro trucks
- 26E055: Grote replacement marker lights with part number 78513681
- 25V867: 2010-2016 Granite (GU) trucks
All 113 Mack campaigns we hold · Every manufacturer in the record
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 25V803 on 23 August 2026, they were:
- Defect summary
e1f0a507 - Consequence
adaf3884 - Remedy
8c4e512e
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 25V803 · how the whole register is watched
This notice names one vehicle among several registers that have written about it. Every notice this site holds for the Mack Pioneer PR (4), in all seven, is kept on that vehicle's own page, with the newest in each.
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Owners of these cars
No register publishes what happens after the letter. Owners do: tell us, in two taps.
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