RecallMyCar

2026 Mack Pioneer PR (4) Recalls, Complaints & Specs

9 safety recalls list the 2026 Mack Pioneer PR (4). At least one recall carries a do-not-drive or park-outside advisory. Check your own VIN below.

9
safety recalls
0
owner complaints to NHTSA

9 safety recalls for the 2026 Mack Pioneer PR (4)

Most recent first. Recall repairs are free at any authorised dealer. Click a recall for the full defect, consequence and remedy text.

  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…

  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…

  3. 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,…

  4. 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.…

  5. 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…

  6. 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…

  7. 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…

  8. 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…

  9. 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…

No owner complaints on file

NHTSA has no owner complaints on file for the 2026 Mack Pioneer PR (4). For context, the average model year in NHTSA's database has dozens; a zero can mean a reliable vehicle, a rare one, or both.

Compare Mack Pioneer PR (4) model years

Recall and complaint counts for every Mack Pioneer PR (4) model year in NHTSA's database.

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

Checking a specific 2026 Mack Pioneer PR (4)

How do I know if my 2026 Mack Pioneer PR (4) has an open recall?

Enter your 17-character VIN above. The VIN is on the driver's side dashboard (visible through the windshield), the driver's door jamb sticker, and your registration or insurance card. The check runs against NHTSA's live database and tells you which campaigns list your vehicle. 9 campaigns currently list the 2026 Mack Pioneer PR (4); your car may already have been repaired under some of them.

Is the recall repair free?

Yes. Under federal law, manufacturers must fix safety recalls at no charge for vehicles up to 15 years old from the date of sale to the first owner. Contact any authorised Mack dealer with your VIN and the NHTSA campaign number (for example 25V521000).

What is the difference between a recall and a complaint?

A recall is a safety campaign filed by the manufacturer or ordered by NHTSA, with a defined defect and remedy. A complaint is a report an owner sent to NHTSA; it is not verified, but patterns of complaints are what trigger NHTSA investigations and, eventually, recalls.

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.