# NHTSA recall 26V620000

A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.

- Published by: NHTSA \(United States\)
- Campaign number: 26V620000
- Manufacturer's number: SC0500
- Manufacturer: Mack Trucks, Inc.
- Reported: 2026\-09\-28
- Component: SERVICE BRAKES, ELECTRIC:SOFTWARE/PROGRAMMING
- Units potentially affected: 850
- Part numbers: 26020191

## What is wrong

Mack Trucks, Inc. \(Mack\) is recalling certain 2026\-2027 Anthem AN \(4\) and Pioneer PR \(4\) vehicles equipped with a tanker application package. Inaccurate axle load calculations may cause reduced braking performance while transporting smoothbore tanker trailers.


## What can happen

Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.


## The remedy

Dealers will install new software to disable the dynamic trailer braking calculations, free of charge. Owner notification letters are expected to be mailed November 27, 2026. Owners may contact Mack's customer service at 1\-800\-866\-1177. Mack's number for this recall is SC0500. Vehicle Identification Numbers \(VINs\) involved in this recall will become searchable on NHTSA.gov on October 5, 2026.


## Vehicles this campaign lists

- [2026 MACK ANTHEM AN \(4\)](/makes/mack/anthem/2026/recalls.md). Built 2025\-07\-08 to 2026\-09\-26. Listed as a series or trim of this model.
- [2027 MACK ANTHEM AN \(4\)](/makes/mack/anthem/2027/recalls.md). Built 2025\-07\-08 to 2026\-09\-21. Listed as a series or trim of this model.
- [2026 MACK PIONEER PR \(4\)](/makes/mack/pioneer/2026/recalls.md). Built 2025\-02\-24 to 2026\-09\-11. Listed as a series or trim of this model.
- [2027 MACK PIONEER PR \(4\)](/makes/mack/pioneer/2027/recalls.md). Built 2025\-02\-24 to 2026\-09\-11. Listed as a series or trim of this model.

## Bulletins for the same vehicles and component

A bulletin is the manufacturer's note to its dealers. It is not part of this recall.

- [CBR 2599 202608](/bulletins/11036589.md), 2026-09-01, Service bulletin
- [TSB M\-590\-001 072026](/bulletins/11035510.md), 2026-08-03, Service bulletin
- [CBR 2585\-1 202605](/bulletins/11033137.md), 2026-06-02, Service bulletin
- [CBR 2569\-3 202604](/bulletins/11032091.md), 2026-05-05, Service bulletin
- [CBR 2570\-1 032026](/bulletins/11030589.md), 2026-04-02, Service bulletin
- [CBR 2443\-3 202601](/bulletins/11028043.md), 2026-02-03, Service bulletin
- [CBR 2503 092025](/bulletins/11023456.md), 2025-10-01, Service bulletin
- [CBR 407 072025](/bulletins/11021333.md), 2025-08-04, Service bulletin

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

JSON: [/v1/recalls/nhtsa/26V620000](/v1/recalls/nhtsa/26V620000)

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