2027 Mack Pioneer Pr (4) | 2027 Mack Anthem An (4) | 2026 Mack Anthem An (4) | 2026 Mack Pioneer Pr (4) | 2025 Mack Pioneer Pr (4) — Service brakes, air: antilock: control unit/module
Published April 23, 2026 · Recall initiated: April 23, 2026
Summary
NHTSA records recall 26V261000, published April 23, 2026. Recalling firm: Mack Trucks, Inc.; 2027 Mack Pioneer Pr (4) | 2027 Mack Anthem An (4) | 2026 Mack Anthem An (4) | 2026 Mack Pioneer Pr (4) | 2025 Mack Pioneer Pr (4) — Service brakes, air: antilock: control unit/module.
What's the hazard
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).
What 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.
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Recall details
- Brand
- MACK
- Model
- PIONEER PR (4)
- Manufacturer
- Mack Trucks, Inc.
- Lot
- 2027 MACK PIONEER PR (4) | 2027 MACK ANTHEM AN (4) | 2026 MACK ANTHEM AN (4) | 2026 MACK PIONEER PR (4) | 2025 MACK PIONEER PR (4)
- Risk classification
- V
- Country
- US
Related recalls
- NHTSA2027 Mack Anthem An (4) | 2027 Mack Pioneer Pr (4) — Exterior lightingAugust 7, 2026
- NHTSA2025 Mack Terrapro (Te) — Steering: critical fastenersAugust 6, 2026
- NHTSA2026 Mack Granite (Gr) | 2027 Mack Pinnacle (Pi/Pn) | 2026 Mack Pioneer Pr (4) | 2027 Mack Pioneer Pr (4) |May 29, 2026
- NHTSA2026 Volvo Vnr (4) | 2025 Volvo Vnl (4) | 2027 Volvo Vnr (4) | 2027 Volvo Vnl (4) | 2026 Volvo Vnl (4) —April 23, 2026
- NHTSA2025 Dodge Charger Ev | 2024 Dodge Charger Ev | 2025 Jeep Wagoneer S | 2024 Jeep Wagoneer S — ElectricalApril 23, 2026
- NHTSA2025 Mack Pioneer Pr (4) | 2026 Mack Pioneer Pr (4) | 2027 Mack Pioneer Pr (4) — Exterior lighting: turnApril 1, 2026
Questions about this recall
Was 2027 Mack Pioneer Pr (4) | 2027 Mack Anthem An (4) | 2026 Mack Anthem An (4) | 2026 Mack Pioneer Pr (4) | 2025 Mack Pioneer Pr (4) — Service brakes, air: antilock: control unit/module recalled?
Yes. NHTSA published recall 26V261000 on April 23, 2026. Reported hazard: 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).
What should I do if I have this product?
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 do I know if my unit is part of the recall?
Compare your product details with the notice. Brand: MACK. Model: PIONEER PR (4).