Defect: Mack Trucks, Inc. (Mack) is recalling certain 2024-2026 Mack MD vehicles. When the Controller Area Network (CAN) communications are interrupted, the throttle signal from the electro mobility control unit may retain the last known throttle setting, and the engine will not return to idle as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standar (excerpt)
Consequence: An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash. (excerpt)
Remedy: Dealers will update the control unit software, free of charge. Owner notification letters were mailed August 14, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0481. (excerpt)
Do not drive: No. Park outside: No.
Investigations
0 investigations; 0 open.
Manufacturer communications
17 manufacturer communications.
Communications by system
System
Count
ELECTRICAL SYSTEM
13
POWER TRAIN
3
SERVICE BRAKES
2
FUEL/PROPULSION SYSTEM
1
STRUCTURE
1
SUSPENSION
1
UNKNOWN OR OTHER
1
11036591
Date: 2026-08-06. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM, STRUCTURE.
The current MD electric cooling box mounting blocks access to the radiator drain. This procedure gives the instructions to gain access to the radiator drain.
11036597
Date: 2026-08-02. Type: Service Campaign. Systems: ELECTRICAL SYSTEM.
Certain MMDe model Mack trucks were assembled without fuse and relay center labels.
11032086
Date: 2026-04-09. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.
CBR - Mack Carrier Nut Adhesive Change.
11032092
Date: 2026-04-09. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
11027022
Date: 2025-12-02. Type: Service Campaign. Systems: ELECTRICAL SYSTEM.
SC - MMDe Instrument Cluster Software
11024782
Date: 2025-10-16. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
Date: 2025-08-22. Type: Service Bulletin/Repair Instructions. Systems: 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.
11021332
Date: 2025-07-28. Type: Service Bulletin/Repair Instructions. Systems: 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.
11021333
Date: 2025-07-17. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM, SERVICE BRAKES.
CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
11019949
Date: 2025-06-01. Type: Service Campaign. Systems: ELECTRICAL SYSTEM, UNKNOWN OR OTHER.
Mack Trucks has identified that certain MDe model trucks may have complications with the instrument cluster displaying a message requesting the truck be shifted into neutral when the drivera s door is opened, and the truck is already in neutral. Some trucks may also experience issues related to ins
Notes on this record
Complaints from the API and bulk file are merged and deduplicated by ODI number; the API alone misses records.
System and subsystem counts are numbers of distinct complaints, recalls or communications that name them. One record can name several systems, so shares across systems can add to more than 100 percent; a single share never exceeds 100 percent.
Recalls are counted once per campaign, investigations once per action and manufacturer communications once per NHTSA id, even when NHTSA lists several model names for the same record.
A sales denominator is a calendar-year proxy, not the population of vehicles still in use. Rates are copied from verified pipeline output.
This record lists no complaint under this name, and zero is not confirmed in this data build; the notes below give the reason.
NHTSA lists complaints for this model year under related names: MD (1). They are counted on those records, not here. Zero is not confirmed for this name.