- The problem
- Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Mack MD, 2019-2025 Anthem, Granite, 2024 MD Electric, and 2025 Pinnacle trucks equipped with a passenger bench seat. The seat belt anchorage bracket may be improperly welded. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."
- The risk
- An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.
- The fix
- Dealers will install a reinforcement plate, free of charge. Owner letters were mailed January 21, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0485. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning October 13, 2025.
Vehicle safety record
2023 Mack MD Problems, complaints & recalls
Owners have filed 1 complaint about the 2023 Mack MD with NHTSA, most often about the engine & cooling (1) and the fuel system (1). It is covered by 2 recalls, the latest in October 2025 for the anchorage. For comparison, the 2022 has 0 and the 2024 has 1.
NHTSA data checked
CAbout as many problems as a typical MD year, for its age
#327 most complained-about 2023 vehicle
- Complaints
- 1
- Recalls
- 2
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
Most common 2023 Mack MD problems
Share of all 1 complaints. One complaint can name more than one area. Tap an area for its complaints and recalls.
2023 Mack MD recalls 2
Recall repairs are free. Your dealer fixes them whether or not you bought the car there - check your VIN at nhtsa.gov/recalls to see if yours is done. What to do
- The problem
- Mack Trucks, Inc. (Mack) is recalling certain 2023 MD6/7 trucks. The engine control module (ECM) may experience an internal short-circuit, which can result in an unexpected engine shut down.
- The risk
- An unexpected engine shut down can increase the risk of a crash.
- The fix
- Cummins will replace the ECM, free of charge. Owner notification letters were mailed on September 27, 2022. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0438.
What owners say
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1 complaints about the 2023 Mack MD
Newest first, as filed with NHTSA by owners.
COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor - a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission - catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec...
Read the full complaint
2023, 14 months before the DPF symptoms - proving a system-wide defect. All failed components and repair invoices are available for inspection upon request. SAFETY RISK: After the dealer declared repairs complete, the truck was driven under 10 miles when the engine entered SEVERE DERATE (limp) mode WITHOUT WARNING, with four alerts firing at once including aftertreatment and transmission failures. Sudden, drastic power loss on a heavy commercial truck in live traffic is extremely dangerous - it can leave the vehicle unable to maintain highway speed, risking a collision with surrounding vehicles. The dealer released the truck in this hazardous state with no warning. CONFIRMED BY MULTIPLE SHOPS: Yes. The problem was reproduced and confirmed repeatedly - by the authorized dealer, by an independent transmission shop, and at final repair. The fault returned within 30 minutes on one visit and within 10 miles on another. INSPECTED BY: The authorized dealer and an independent service center inspected the vehicle and failed components. Documentation is available. WARNING SIGNS: Yes. Warning lamps appeared from the very first visit in Feb 2025 - transmission code P071A and high soot codes 1981/1922. They persisted for NINE MONTHS without proper repair, until the transmission catastrophically failed in Nov 2025. The vehicle was out of service over 45 days.
Mack MD: every year compared
All MD years2023 Mack MD vs rivals
| Vehicle | Complaints | Recalls | Grade | |
|---|---|---|---|---|
| 2023 Mack MD | 1 | 2 | C | |
| 2023 Mack Granite (GR) | 2 | 8 | F | Compare |
More sales usually means more complaints, so compare similar vehicles of the same year. The grade compares each vehicle with its own model's other years.
Questions about the 2023 Mack MD
Does the 2023 Mack MD have any recalls?
Yes - NHTSA lists 2 recalls for the 2023 Mack MD: anchorage (October 2025); engine control module (ecu / ecm) (August 2022). Recall repairs are free at any authorized dealer. Enter your VIN at nhtsa.gov/recalls to see whether yours has been fixed.
What are the most common problems with the 2023 Mack MD?
By the complaints owners filed with NHTSA, the most common problem areas are the engine & cooling (1), fuel system (1), transmission & drivetrain (1).
How many complaints has the 2023 Mack MD had?
1 complaints have been filed with NHTSA, the first on June 17, 2026 and the latest on June 17, 2026. Of these, 0 describe a crash and 0 a fire, and together they report 0 injuries and 0 deaths.
Is the 2023 Mack MD a reliable vehicle?
Its Safety Index is 51 out of 100 (grade C: about as many problems as a typical Mack MD year, for its age). The index weighs complaints, crashes, fires, injuries, deaths and recalls against how long the vehicle has been on the road, compared with the same model's other years. It is not a measure of every repair - read the complaints and owner experiences, and have any used vehicle inspected before you buy.
Which Mack MD years have the most complaints?
2023 (1), 2024 (1), 2025 (1). See every Mack MD year compared.
What should I do if my 2023 Mack MD has a problem?
If it is a safety problem, stop driving it if it is unsafe and contact your dealer. Report it to NHTSA at nhtsa.gov/report-a-safety-problem - enough reports start investigations and recalls - and share your experience here so other owners know what to look for.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data