# Recalls that may apply to the 2003 Mack DMM

A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.

## United States (NHTSA), as of 2026-10-19

- [03V253000](/recalls/nhtsa/03V253000.md), 2003-07-17: SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE. CERTAIN HEAVY DUTY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS."  IMPROPER SEATING OF THE CHECK VALVE RETAINER IN THE BRASS FITTING HOUSING HAS OCCURRED.  IT IS POSSIBLE FOR THE AIR BRAKE SYSTEM PRESSURE TO PUSH THE CHECK VALVE INTERNAL PARTS INTO THE PRIMARY SYSTEM RESERVOIR AND A VEHICLE OPERATOR WOULD NOT KNOW THAT THIS HAS HAPPENED. Built 2003\-05\-19 to 2003\-07\-11.

## Canada (Transport Canada), as of 2026-10-19

- [2003315](/recalls/tc/2003315.md), 2003-12-05: Brakes. Certain vehicles do not comply with the requirements of CMVSS 121 "Air Brake Systems".  Due to improper seating of the check valve retainer in the brass fitting housing, it is possible for the air brake system pressure to push the check valve internal parts into the primary system reservoir and a vehicle operator would not know that this has happened.  In this condition, the vehicle would not meet the emergency requirements of the standard.  Correction:  Dealer will replace the check valve.

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

Contains information licensed under the Open Government Licence – Canada.

JSON: [/v1/vehicles/2003_mack_dmm/recalls](/v1/vehicles/2003_mack_dmm/recalls)

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