Technical Service Bulletin S4325 072025 — 2025 MACK MD
ENGINE
Bulletin Details
| TSB ID | S4325 072025 |
| Manufacturer | |
| Vehicle | 2025 MACK MD |
| Component | ENGINE |
| Communication Date |
Bulletin Summary
CBR - Mack Trucks has identified that certain 2025 model year Mack Medium Duty (MMD) vehicles may have been assembled with insufficient torque on the fan hub retaining hardware.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2025 MACK MD
S4325 202412
ENGINE