The Recall Desk
Our severity:SevereNHTSA·26V351000·Announced 2026-05-28

Mack Trucks Recalls 644 Vehicles Due to Wheel Lug Nut Loosening Risk

Mack Trucks is recalling 644 vehicles because wheel lug nuts may loosen, allowing the wheel to detach. Owners are advised not to drive until repairs are completed.

NHTSA safety advisory

Do not drive this vehicle

NHTSA advises owners to stop driving this vehicle until the recall repair has been completed.

This is the agency’s own advisory, not our assessment. Contact the manufacturer or a dealer, and see the official NHTSA notice for the current guidance.

What this means for you

Our assessment, not the agency’s: severity 4/5 (Severe).

The hazard poses a serious risk of illness, injury, or structural failure. Stop using the product immediately and contact the manufacturer for a refund or repair.

Our severity reasoning: The recall involves a structural vehicle defect (wheel detachment) that can cause loss of vehicle control, which aligns with the rubric criteria for a Severe (4) rating.

Plain-English summary

Mack Trucks, Inc. is recalling 644 specific model-year 2026 and 2027 vehicles, including the Anthem, Pioneer, Pinnacle, and Granite models. The recall addresses a defect where wheel lug nuts may loosen, which can allow the wheel to detach from the vehicle.

Wheel detachment can cause a loss of vehicle control or create a road hazard, increasing the risk of a crash or injury. No specific injuries or fatalities are reported in the source text, but the potential for serious harm is noted.

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, free of charge. Owner notification letters were mailed on June 22, 2026, and owners may contact Mack's customer service at 1-800-866-1177.

The recalled product

Product
MACK PIONEER PR (4), ANTHEM (AN), PINNACLE (PI/PN), ANTHEM AN (4)
Brand
MACK
Manufacturer
Mack Trucks, Inc.
Category
Vehicle — Heavy-Duty Trucks
Hazard
Affected units
644

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Model numbers (5)

  • PIONEER PR (4)
  • ANTHEM (AN)
  • PINNACLE (PI/PN)
  • ANTHEM AN (4)
  • GRANITE (GR)

Distribution

Distributed nationwide across the United States.

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