---
title: "MACK PIONEER PR (4) (2026) - Recall 26V261000 — NHTSA record 323020 | Is It on Recall"
description: "Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-2027 Anthem (4) vehicles. The rear brake modulators may have unprotected electrical"
url: https://isitonrecall.com/recall/nhtsa-323020-mack-pioneer-pr-4-2026-recall-26v261000/
updated: 2026-10-01
site: "Is It on Recall"
language: en
---

[Recall archive](https://isitonrecall.com/archives/) / NHTSA

# MACK PIONEER PR (4) (2026) - Recall 26V261000 — NHTSA record 323020

Published notice; closure not supplied

A campaign record does not say whether this individual vehicle has received the remedy. Check the VIN with NHTSA or the manufacturer.

Source date Apr 23, 2026. Retrieved Oct 1, 2026. Last updated Oct 1, 2026.

Archive changed Oct 1, 2026. USDA FSIS records are unavailable; [check FSIS directly](https://www.fsis.usda.gov/recalls). [Source coverage and dates](https://isitonrecall.com/sources/).

## What the record says

- **Product**: MACK PIONEER PR (4) (2026) - Recall 26V261000
- **Reason**: Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-2027 Anthem (4) vehicles. The rear brake modulators may have unprotected electrical connectors that can short circuit and lead to a loss of the anti-lock brake system (ABS) and electronic stability control (ESC). A loss of anti-lock brakes and electronic stability control increases the risk of a crash or injury.
- **Classification**: Not supplied
- **Recalling firm**: Mack Trucks, Inc.
- **Quantity**: 2772
- **Agency-reported status**: Published safety recall
- **Source record identifier**: 323020

[Open the official record](https://api.nhtsa.gov/recalls/campaignNumber?campaignNumber=26V261000)

## Lot and product identifiers

| Label field | Details supplied by the agency |
| --- | --- |
| Lot, code or applicability | Product applicability: MACK PIONEER PR (4); model year 2026. Check the model identifiers and, for a vehicle, the VIN on the official recall site. |

Match all identifying details in the current notice. A brand name alone is not enough.

## Distribution

Not supplied

No US distribution state could be established from this record. Check the official notice.

## Dates in the source

- **Report received**: Apr 23, 2026
- **Manufacturer end**: Apr 21, 2026
- **Owner notification**: Jun 8, 2026
- **Record created**: Apr 23, 2026

FDA company pages use the listing date; enforcement records use initiation dates; CPSC uses recall date; NHTSA uses report-received date. These dates are not interchangeable.

## What to do next

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.

[Read the current instructions](https://api.nhtsa.gov/recalls/campaignNumber?campaignNumber=26V261000)

Use [NHTSA's VIN check](https://www.nhtsa.gov/recalls) to check an individual vehicle and its remedy status.

## Related records

[Vehicles records](https://isitonrecall.com/product/cars/) [Vehicles and equipment records](https://isitonrecall.com/category/vehicles/) [Mack Trucks, Inc. records](https://isitonrecall.com/brand/mack-trucks-inc/)