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Mack Pioneer PR (4) Recalls & Complaints by Model Year

NHTSA lists 15 safety recalls and 0 owner complaints across 3 model years of the Mack Pioneer PR (4) (2025–2027).

15
safety recalls, all years
0
owner complaints, all years
2025
year with most recalls

Pick your Mack Pioneer PR (4) model year

Model yearRecallsComplaints
2027 Mack Pioneer PR (4)60
2026 Mack Pioneer PR (4)90
2025 Mack Pioneer PR (4)120

All Mack Pioneer PR (4) recalls (15)

Every NHTSA safety campaign that lists a Mack Pioneer PR (4), most recent first, with the model years each one covers.

  1. Active shutters/grill (structure) and exterior trim (structure)

    NHTSA 26V631000 Reported 3,096 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2026-2027 Anthem AN (4) and 2025-2027 Pioneer PR (4) vehicles. The intake and grille bezels may detach from the vehicle.

    Remedy: Dealers will inspect, replace the intake and grille bezels, and install cable ties as necessary, free of charge. Owner notification letters are expected to be mailed November 30, 2026. Owners may contact Mack's…

    Model years: 2025, 2026, 2027

  2. Software/programming (service brakes)

    NHTSA 26V620000 Reported 850 vehicles potentially affected Mack Trucks, Inc.

    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.

    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…

    Model years: 2026, 2027

  3. Exterior lighting

    NHTSA 26V515000 Reported 513 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2027 Anthem AN (4) and Pioneer PR (4) vehicles. The center roof marker lights may fail to illuminate. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."

    Remedy: Dealers will replace the center roof marker light, free of charge. Interim letters notifying owners of the safety risk were mailed September 22, 2026. Additional letters will be sent once the final remedy is available.…

    Model years: 2027

  4. Lugs/nuts/bolts/studs (wheels) Do not drive

    NHTSA 26V351000 Reported 644 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2026 Anthem (AN), 2026-2027 Pioneer PR (4), Pinnacle (PI/PN), Granite (GR), and 2027 Anthem AN (4) vehicles. The wheel lug nuts may loosen and allow the wheel to detach.

    Remedy: Owners are advised not to drive their vehicles until the repair has been performed. Dealers will inspect the wheel and hub mating surfaces, remove any masking material, and replace any worn components if necessary,…

    Model years: 2026, 2027

  5. Service brakes, air: control unit/module

    NHTSA 26V261000 Reported 2,772 vehicles potentially affected Mack Trucks, Inc.

    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).

    Remedy: 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.…

    Model years: 2025, 2026, 2027

  6. Turn signal (exterior lighting)

    NHTSA 26V207000 Reported 86 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2027 Anthem (4) trailers. The trailer turn signals may not function properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."

    Remedy: Dealers will update the turn signal indicator software, free of charge. Owner notification letters were mailed May 7, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is…

    Model years: 2025, 2026, 2027

  7. Mechanical (equipment)

    NHTSA 25V801000 Reported 46 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2025-2026 Pioneer vehicles. The load lock clamps, located on the back of the cab, may loosen and cause the load lock bars to become unsecured.

    Remedy: Dealers will replace the load lock clamps, free of charge. Owner notification letters were mailed December 18, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is…

    Model years: 2025, 2026

  8. Software (exterior lighting)

    NHTSA 25V803000 Reported 247 vehicles potentially affected Mack Trucks, Inc.

    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…

    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…

    Model years: 2025, 2026

  9. Lighting control module (exterior lighting)

    NHTSA 25V622000 Reported 156 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2025-2026 Pioneer vehicles. When towing a trailer, the trailer lights may fail to illuminate due to an improperly manufactured body control module.

    Remedy: Dealers will replace the trailer body input/output module, free of charge. Owner letters were mailed November 19, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is…

    Model years: 2025, 2026

  10. Steering

    NHTSA 25V521000 Reported 32 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2025 Anthem and 2025-2026 Pioneer vehicles. The dynamic steering and oversteer guidance feature may malfunction and cause a loss of steering control.

    Remedy: The oversteer guidance feature will be disabled through an over-the-air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed August 21, 2025. Owners may contact Mack's customer service at…

    Model years: 2025, 2026

  11. Reservoir/tank (service brakes)

    NHTSA 25V026000 Reported 21 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2024-2025 Pinnacle (PI/PN) trucks. The air tanks have an insufficient volume of air for the brake system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."

    Remedy: Dealers will install the correct volume air tanks, free of charge. Owner notification letters were mailed February 10, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall…

    Model years: 2025

  12. Software (electrical system) and service brakes, hydraulic: control unit/module

    NHTSA 24V792000 Reported 59,338 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Anthem, Granite, TerraPro and Pinnacle vehicles, equipped with Bendix EC80 Advanced Electronic Control Units (ECU). Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop working.

    Remedy: Dealers will reprogram the ECU software, free of charge. Owner notification letters were mailed December 9, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0472.

    Model years: 2025

  13. Critical fasteners (seats) and critical fasteners (seat belts)

    NHTSA 24V567000 Reported 242 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2024-2025 Anthem, Granite, and Pinnacle vehicles equipped with RollTek driver's seat assemblies. The seat pedestal and seat belt attachment may have been improperly tightened.

    Remedy: Dealers will replace and tighten the seat pedestal and seat belt attachment bolts, free of charge. Owner notification letters were mailed September 16, 2024. Owners may contact Mack customer service at 1-800-866-1177.…

    Model years: 2025

  14. Tie rod assembly (steering)

    NHTSA 24V504000 Reported 59 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2025 LR, Granite, and Pinnacle vehicles equipped with Composilite EXS20 steerable lift axle suspension assemblies. The tie rod assembly ball stud could have been improperly heat treated and can fail.

    Remedy: Dealers will inspect and replace the tie rod end assemblies as necessary, free of charge. Owner notification letters were mailed July 15, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number…

    Model years: 2025

  15. Axle assembly (power train) and tie rod assembly (steering) Do not drive

    NHTSA 24V424000 Reported 7 vehicles potentially affected Mack Trucks, Inc.

    Mack Trucks, Inc. (Mack) is recalling certain 2025 Anthem and Pinnacle trucks. The tie rod assemblies may contain an improperly heat-treated ball stud that can fail, resulting in a sudden loss of steering control.

    Remedy: Owners are advised not to drive their vehicles until the remedy has been completed. Dealers will inspect and replace the tie rod ends as necessary, free of charge. Owner notification letters were mailed June 17, 2024.…

    Model years: 2025

Other Mack models

Source: NHTSA recall and complaint databases and EPA fuel economy data, October 2026. Complaint counts are owner reports to NHTSA, not verified defects. Recall counts are safety campaigns that list this model year; whether a particular car was already repaired depends on its VIN. How this data is compiled.