Complaints over time
Complaints about the 2025 Mack MD peaked in 2024, with 1 filed
Owner complaints about this model year, by the year they were filed with NHTSA.
Source: NHTSA ODI complaints file. The lighter column runs through October.
Model year
2025 Mack MD
Truck, diesel, 4x2, built in United States. Owner complaints on file from Nov 17, 2024 to Nov 17, 2024.
Recall campaigns covering this model year216k vehicles or units across those campaigns
Owner complaints1Close to the median 2025 truck
Severity index0.02025 trucks average 27.3
First 24 months1Complaints in its first two years
Components
100% of complaints about the 2025 Mack MD name powertrain
Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.
Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls
2 recall campaigns cover the 2025 Mack MD
Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.
| Campaign | Filed | Subject | Component | Vehicles | Remedy |
|---|---|---|---|---|---|
| 25V-666 | Oct 6, 2025 | Seat belt anchorage bracket may be improperly welded | Seat belts | 15,841 | Repair or modification |
| 24V-333 | May 14, 2024 | Gross Axle Weight Rating (GAWR) listed on the vehicle certification label is incorrect, which can allow the vehicle to be overloaded | Equipment | 26 | Part replacement |
Source: NHTSA ODI recalls file.
Owner complaints
What owners reported about the 2025 Mack MD
The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.
1 complaint on file, page 1 of 1.
- Filed Nov 17, 2024Failure Mar 11, 2024Amsterdam, NYPower train, Service brakes
[XXX] - the truck lost brakes for the first time. The truck was returned 3/15/24 3/20/24 - The truck went back in the shop to get parts installed that were ordered. The truck was picked up 4/15/24. 4/16/24 - The truck went back in to the dealer for break noise and issues. The truck was picked up on 4/19/24. 4/22/24 - The truck went back to the dealer for break failure and issues. The truck was picked up 5/4/24 7/5/24 - The truck went back in the shop for break issues. The truck was picked up on 7/15/24 8/20/24 - the truck lost breaks - @ 11:14am, we called Dave/Mangino's @ 11:21am Let him know that we are done with the truck - it's not safe and that the dealer needs to figure out what to do next. 8/22/24 - Dropped truck off at Mangino's for the "Buy Back" per Dave Grossbeck. Also turned in the licenses plates. Waiting to hear from Dave for exact amount of check. 8/23/24 - Dave Grossbeck - told us he still does not have any answers from GM It's going to take some time. 8/26/24 - we went to Mangino's and met with Dave Grossbeck & Mike Coffey to call GM Customer Service together. Asked to speak with a supervisor. Was told they would have a call back within 24-48 hours. Have not heard back to date (8/30/24). Dave Grossbeck called GM Upper Management and was told they were having a meeting on Wednesday (8/28/24) regarding the truck. 8/26/24 - we contacted Gus (GM Engineer) regarding the truck - Guys replied that he was coming out on Wednesday (8/28/24) to evaluate the truck. 8/28/24 - Gus came to Mangino's - we heard nothing from anyone. 8/29/24 - we stopped in at Mangino's Dave Grossbeck had no new answers. 8/30/24 - Dave Grossbeck returned a call from us. Dave requested our GM claim #. 9/9/24 we received a payment for the truck in full minus interest and deal fees for the buy back. A week later the truck was on the dealers lot for sale. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint 11625816
Source: NHTSA ODI complaints file.
Investigations
NHTSA has not opened an investigation on this model year
Source: NHTSA ODI investigations file.
Service bulletins
20 manufacturer communications cover this model year
Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall.
- CBR 2573-1 202604 Apr 9, 2026 · Service Bulletin/Repair Instructions
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers. - CBR 2362-3 202604 Apr 9, 2026 · Service Bulletin/Repair Instructions
CBR - Mack Carrier Nut Adhesive Change. - TSB M-432-002A 032026 Mar 12, 2026 · Service Bulletin/Repair Instructions
TSB - Cable, Gear Selector, Replacement - CBR 2712-7 032026 Mar 19, 2026 · Service Bulletin/Repair Instructions
CBR - No Start Condition After Over the Air Programing. - CBR 2517-1 102025 Oct 22, 2025 · Service Bulletin/Repair Instructions
CBR - Wiper Linkage Inspection. - CBR 2172-5 082025 Aug 22, 2025 · Service Bulletin/Repair Instructions
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. - S4325 072025 Jul 8, 2025 · Service Campaign
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 407 072025 Jul 17, 2025 · Service Bulletin/Repair Instructions
CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded. - CBR 2488 072025 Jul 28, 2025 · Service Bulletin/Repair Instructions
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 May 27, 2025 · Service Bulletin/Repair Instructions
Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer - CBR-561 202503 Mar 6, 2025 · Service Bulletin/Repair Instructions
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 - S4325 202412 Dec 9, 2024 · Service Campaign
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 high-quality standards, please follow the i… - CBR-2016 202412 Dec 3, 2024 · Service Bulletin/Repair Instructions
Frame lean can be caused by several seemingly isolated possibilities. The two most common are suspension and frame assembly issues. - CBR-997 202411 Nov 14, 2024 · Service Bulletin/Repair Instructions
Vehicles may present with oil leak coming from the clutch/flywheel housing and observation of burned clutch smell or clutch slipping. These symptoms can be mistaken as a crankshaft rear main seal leak, when the actual cause is the crankshaft adaptor O-ring. - CBR-407 202409 Sep 13, 2024 · Service Bulletin/Repair Instructions
CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded. - CBR-2391 202408 Aug 6, 2024 · Service Bulletin/Repair Instructions
CBR: Diagnostic Trouble Code (DTC) U010187- Lost Communication With TECU - CBR-2350 202407 Jul 2, 2024 · Service Bulletin/Repair Instructions
CBR: Telematics Gateway (TGW) Connect Ability Issues - CBR-2013 202404 Apr 2, 2024 · Service Bulletin/Repair Instructions
CBR: Turbo Compound (TC) Hot Side Noise, Diagnostic Information. - CBR-1008 202404 Apr 22, 2024 · Service Bulletin/Repair Instructions
CBR: Equipped With An Automated Manual Transmission Model D or F ( AMT-D, AMT-F, mDrive) Missing X1 Value In VDA And Default Settings Guidelines, ParameterP1AOB; Fault Code P1052-54, Error 40,Or Error 18 Encountered During Clutch Or Tran. - CBR-2139 202403 Mar 1, 2024 · Service Bulletin/Repair Instructions
CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil. It is possible that the source of the fuel is the rear fuel galley plug in the cylinder head.
Source: NHTSA manufacturer communications files.