AI Damage2025 Mack MD: common problems
The maker issued 20 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 20
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 0 | 0 | 6 |
| Engine | 0 | 0 | 5 |
| Powertrain | 0 | 0 | 5 |
| Engine and cooling | 0 | 0 | 2 |
| Service brakes | 0 | 0 | 2 |
| Fuel/propulsion system | 0 | 0 | 1 |
| Suspension | 0 | 0 | 1 |
| Visibility | 0 | 0 | 1 |
| Other | 0 | 0 | 1 |
Comparison
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers
- CBR - Mack Carrier Nut Adhesive Change
- TSB - Cable, Gear Selector, Replacement
- CBR - No Start Condition After Over the Air Programing
- CBR - Wiper Linkage Inspection
- CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job…
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 - Mack Trucks has identified that certain 2025 model year Mack Medium Duty (MMD) vehicles may have…
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.
- CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded
- CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office…
CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit GPS location data.
- Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer
- If oil dilution is suspected refer to the applicable CBR solution below
∙ CBR-659Mack Chassis - Oil Diluted With Fuel; Fuel In Oil, Diagnostic Information - All Emissions, All Model Years
- Mack Trucks has identified that certain 2025 model year Mack Medium Duty (MMD) vehicles may have been…
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. To address this issue and maintain Mack's…
NHTSA lists 20 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2025 Mack MD?
There are no owner complaints in the NHTSA data for this year; the data comes from 20 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2025 Mack MD?
NHTSA lists 20 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2025 Mack MD from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2025 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.