Recall 21V574 affects 60 2022 Mack Md trucks for loose front spring hanger bracket bolts. Repair is free at any franchised Mack dealer.
Mack is recalling 60 2022 Md trucks because the spring hanger brackets on the front suspension have loose bolts. The bolts can detach and lead to loss of vehicle control, increasing crash risk; Mack dealers will complete the recall repair free of charge.
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What's wrong?
On the 2022 Mack Md, the front suspension spring hanger bracket is the mounting point that holds the leaf spring assembly to the truck frame. The leaf spring supports the front axle and helps keep the truck stable over bumps, turns, and braking. The M16 bolts are the fasteners that clamp that bracket in place.
On affected trucks, a manufacturing defect left the front suspension bolts below the required tightness specification. A loose bracket joint can move instead of staying firmly clamped. That movement puts stress on the bracket, the bolts, and the leaf spring mounting point.
The warning sign Mack identified is front end noise. Listen for knocking, clunking, or rattling from the front suspension, especially over bumps or during low speed turns.
Who's affected?
| 2022 Mack Md | front suspension |
|---|---|
| Units affected | 60 |
| Field incidents | NHTSA has logged no field incidents to date. |
Not every 2022 Mack Md truck is on the list. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
Loose suspension bolts can detach, leading to loss of vehicle control and a higher crash risk. Front-end noise is the warning sign Mack identifies, so treat new noise from the front suspension as a reason to stop when safe and schedule service. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2022 Mack Md is included in this recall.
- Contact your nearest franchised Mack dealer to schedule the free spring hanger bracket bolt tightening, which secures the front suspension.
- Bring the owner letter if you have it, or reference recall number 21V574 when you call.
- Drive cautiously until the repair is complete. Leave extra following distance and avoid abrupt steering.
What happens at the repair
At the dealer, a Mack technician tightens the spring hanger bracket bolts on the front suspension. The recall repair is open now, and parts and labor are free. If you've already paid for a related spring hanger bracket bolt repair before the recall notice, Mack's standard reimbursement plan covers eligible documented expenses. Bring prior repair paperwork and receipts to the service desk, or contact Mack customer service at 1-800-866-1177.
| Reimbursement | Reimbursement available |
|---|
Timeline
| July 27, 2021 | NHTSA published the recall |
|---|---|
| July 30, 2021 | Dealer notification began |
| July 30, 2021 | Dealer notification ended |
| August 17, 2021 | Owner notification mailed |
| August 27, 2021 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V574?
Recall 21V574 covers 60 2022 Mack Md trucks with loose spring hanger bracket bolts on the front suspension. Loose suspension bolts can detach, causing loss of vehicle control and increasing crash risk. Mack dealers will tighten the bolts for free.
What should I do if my 2022 Mack Md is on this recall?
Check your VIN to confirm your specific truck is included in recall 21V574. If it is, contact a franchised Mack dealer to schedule the spring hanger bracket bolt tightening. Reference Mack recall SC0428 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Mack dealers will tighten the affected spring hanger bracket bolts free of charge at any franchised Mack dealer.
Is it safe to drive my 2022 Mack Md before the recall repair?
Use caution until your VIN is checked and the repair is complete. The recall says loose suspension bolts can detach, causing loss of vehicle control and increasing crash risk. If your truck feels unstable or the suspension sounds abnormal, contact a Mack dealer before driving it.
When were Mack owners notified about recall 21V574?
Mack mailed owner notification letters on August 17, 2021. If you bought the truck used or never received a letter, check your VIN and call Mack customer service at 1-800-866-1177 or a franchised Mack dealer with recall number 21V574.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V574000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 21V574 |
| NHTSA recall # (full) | 21V574000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →