NHTSA recall 21V574000
A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.
| Published by | NHTSA (United States) |
|---|---|
| Campaign number | 21V574000 |
| Manufacturer's number | SC0428 |
| Manufacturer | Mack Trucks, Inc. |
| Reported | 2021-07-27 |
| Owners notified | 2021-08-17 |
| Component | SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:HANGER,BRACKET |
| Units potentially affected | 60 |
| Part numbers | 984839 M16x130, 984835 M16x60, 984834 M16x50 |
| Report | Annual report 3, for 2025 quarter 3 to 2026 quarter 2 |
|---|---|
| Filed with NHTSA | 2026-07-01 |
| Vehicles in the campaign | 60 |
| Reported remedied | 56 (93%) |
| Reported unreachable | 0 |
| Reported removed | 0 |
These are the manufacturer's totals for the whole campaign at the end of 2026 quarter 2, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026-10-19.
What is wrong
Mack Trucks, Inc. (Mack) is recalling certain 2022 Medium-Duty Trucks. The spring hanger brackets on the front suspension may have loose bolts.
What can happen
Loose suspension bolts can detach, possibly resulting in a loss of vehicle control and increasing the risk of a crash.
The remedy
Dealers will tighten the spring hanger bracket bolts, free of charge. Owner notification letters were mailed on August 17, 2021. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0428.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
| 2022 MACK MD |
|---|
A vehicle with no link is not in this site's catalog, which covers cars, multipurpose vehicles and trucks by model year. The campaign is from data as of 2026-10-19.
Bulletins for the same vehicles and component
| CBR-2016 202412 | 2025-01-02. Service bulletin. Frame lean can be caused by several seemingly isolated possibilities. The two most common are suspension and frame assembly issues. |
|---|---|
| CBR-2342 202401 | 2024-02-02. Service bulletin. CBR: Mack Medium Duty (MMD) Rear Suspension Bump Stop Bending |
| CBR-2016 202401 | 2024-02-02. Service bulletin. CBR: Frame Or Cab Lean |
| M728-005A 202308 | 2023-09-06. Service bulletin. TSB: Barksdale Leveling Valve, Leak Test |
| KC-2170 | 2022-06-07. Service bulletin. Electronically Controlled Suspension (ECS) Losing Air Pressure |
A bulletin is the manufacturer's note to its dealers. It is not part of this recall.