Mack Pioneer PR Recall: Wheel Detachment Hazard
Mack recalls certain 2026-2027 Pioneer PR trucks due to wheel detachment risk. Stop driving until dealers inspect and repair wheels free of charge.
Stop using this now
Wheel detachment can cause a loss of vehicle control or create a road hazard, increasing the risk of a crash or injury.
What happened, in plain English
Mack Trucks is recalling certain 2026-2027 Pioneer PR (4) vehicles because the wheel lug nuts may loosen, allowing a wheel to detach while driving. This defect creates a significant road hazard and increases the risk of a crash or injury. Owners are advised not to drive their vehicles until the repair has been performed. Read more at govinfonow.com/recall/1365087-mack-pioneer-pr-recall-wheel-detachment-hazard.
Source Summary by GovInfoNow · govinfonow.com/recall/1365087-mack-pioneer-pr-recall-wheel-detachment-hazard · Updated October 9, 2026 · Official notice: NHTSA #26V351000
Cite this page
“Mack Pioneer PR Recall: Wheel Detachment Hazard.” GovInfoNow, updated October 9, 2026. https://govinfonow.com/recall/1365087-mack-pioneer-pr-recall-wheel-detachment-hazard. Based on NHTSA recall #26V351000 (https://www.nhtsa.gov/recalls?nhtsaId=26V351000).
Why it’s dangerous
The wheel lug nuts may loosen over time, which can allow the entire wheel to detach from the vehicle. A detached wheel while driving can cause a loss of vehicle control or create a dangerous obstacle on the road, leading to crashes and injuries.
Who’s affected
Owners of certain 2026-2027 Mack Pioneer PR (4) trucks are affected by this recall. Drivers and other road users are at risk due to the potential for sudden wheel detachment.
How to tell if you have this one
Check if your vehicle is a 2026-2027 Mack Pioneer PR (4). You can verify if your specific truck is included by searching its Vehicle Identification Number (VIN) on NHTSA.gov. Owner notification letters were mailed starting June 22, 2026.
- Brand
Mack- Category
Vehicle
What to do — step by step
Stop driving the vehicle
Do not drive your Mack Pioneer PR until the repair is complete to prevent wheel detachment.
Contact a dealer for inspection
Dealers will inspect the wheel and hub mating surfaces, remove masking material, and replace worn components free of charge.
Call customer service if needed
Contact Mack's customer service at 1-800-866-1177 for assistance or to confirm your recall status.
What NHTSA says to do
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 June 22, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0495. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on May 31, 2026.
How this recall unfolded
Recall timeline
Owners were mailed letters 25 days after NHTSA received the defect report.
- NHTSA received the defect report
- Owner letters mailed
- Added to GovInfoNow
Dates from the agency record only; steps without a date are left out.
Questions people ask
Which vehicles are affected by this recall?
This recall affects certain 2026 Anthem (AN), 2026-2027 Pioneer PR (4), Pinnacle (PI/PN), Granite (GR), and 2027 Anthem AN (4) vehicles manufactured by Mack Trucks, Inc.
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Where this comes from
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
- Official source: NHTSA Recall #26V351000 (May 28, 2026)
- Plain-language summary written by qwen3.6:35b-a3b on October 9, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
- GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.