NHTSA recall 22V401000
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 | 22V401000 |
| Manufacturer's number | SC0437 |
| Manufacturer | Mack Trucks, Inc. |
| Reported | 2022-06-07 |
| Owners notified | 2022-07-29 |
| Component | STEERING |
| Units potentially affected | 5644 |
| Part numbers | 23986581, 21129326, 23851030, 23851036, 23851046, 23851032, 23056973, 24008407, 23851052, 22396595, |
| Report | Annual report 2, for 2025 quarter 3 to 2026 quarter 2 |
|---|---|
| Filed with NHTSA | 2026-07-01 |
| Vehicles in the campaign | 5644 |
| Reported remedied | 4867 (86%) |
| 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 2021-22 Granite, Anthem, LR, Pinnacle, and Terrapro tractor trailers. The steering gears may have been assembled incorrectly, which can cause the gear to fracture.
What can happen
A fractured steering gear can cause a loss of steering control, increasing the risk of a crash.
The remedy
Dealers will replace the steering gear, free of charge. Owner notification letters were mailed on July 29, 2022. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0437.
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.
| 2021 MACK ANTHEM (AN) | Listed as a series or trim of this model. |
|---|---|
| 2022 MACK ANTHEM (AN) | Listed as a series or trim of this model. |
| 2021 MACK GRANITE (GR) | Listed as a series or trim of this model. |
| 2022 MACK GRANITE (GR) | Listed as a series or trim of this model. |
| 2021 MACK LR | |
| 2022 MACK LR | |
| 2021 MACK PINNACLE (PI/PN) | Listed as a series or trim of this model. |
| 2022 MACK PINNACLE (PI/PN) | Listed as a series or trim of this model. |
| 2021 MACK TE | |
| 2022 MACK TERRAPRO (TE) | Listed as a series or trim of this model. |
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 2515-1 102025 | 2025-11-03. Service bulletin. CBR - Hard Steering Due to Steering Column Miter Box Corrosion – Inspection and Replacement Procedure |
|---|---|
| CBR-2375 202405 | 2024-06-04. Service bulletin. CBR: ZF/TRW Steering Gear Side Cover Leak |
| SLM22-004 | 2022-05-06. Service bulletin. Service Literature Published and Released in April, 2022 |
| KC-345 | 2022-02-04. Service bulletin. Mack Chassis - Models GU / GR - Constant Correction To Center |
| KC-345 | 2021-07-02. Service bulletin. Mack Chassis - Models GU / GR - Constant Correction To Center |
| S7545 | 2020-12-01. Service bulletin. Draglink Split Pin Inspection |
A bulletin is the manufacturer's note to its dealers. It is not part of this recall.