Service bulletins for the 2026 Mack MD
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
9 on file from NHTSA, as of 2026-10-19.
By type
By component
| CBR 2573-1 202604 | 2026-05-05. Service bulletin. POWER TRAIN. CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers. |
|---|---|
| CBR 2362-3 202604 | 2026-05-04. Service bulletin. POWER TRAIN. CBR - Mack Carrier Nut Adhesive Change. |
| TSB M-432-002A 032026 | 2026-04-02. Service bulletin. POWER TRAIN. TSB - Cable, Gear Selector, Replacement |
| CBR 2712-7 032026 | 2026-04-02. Service bulletin. ELECTRICAL SYSTEM; UNKNOWN OR OTHER. CBR - No Start Condition After Over the Air Programing. |
| CBR 2517-1 102025 | 2025-11-03. Service bulletin. VISIBILITY/WIPER. CBR - Wiper Linkage Inspection. |
| CBR 2172-5 082025 | 2025-09-02. Service bulletin. ELECTRICAL SYSTEM. CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a Critical failure, the vehicle will remain in Safe State. |
| CBR 407 072025 | 2025-08-04. Service bulletin. SERVICE BRAKES; ELECTRICAL SYSTEM. CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded. |
| CBR 2488 072025 | 2025-08-04. Service bulletin. ELECTRICAL SYSTEM. CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit GPS location data. |
| CBR 2107-21 202505 | 2025-06-02. Service bulletin. FUEL/PROPULSION SYSTEM; ENGINE. Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.