NHTSA vehicle safety data
2003 Mack DM6 Recalls, Ratings & Complaints
The 2003 Mack DM6 has 1 NHTSA recall campaign and 0 owner complaints on file as of October 16, 2026. Recall repairs are usually free at an authorized Mack dealer.
NHTSA recall and complaint data for the 2003 Mack DM6. Recall data is refreshed daily from NHTSA.
SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE
NHTSA #03V253000Reported July 17, 2003 · MACK TRUCKS, INCORPORATED
Potentially affected: 1,232 vehicles
Defect description
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.
Safety consequence
IN THIS CONDITION, THE VEHICLE WOULD NOT MEET THE EMERGENCY REQUIREMENTS OF THE STANDARD.
Manufacturer remedy
DEALERS WILL REPLACE THE CHECK VALVE. OWNER NOTIFICATION BEGAN NOVEMBER 26, 2003. OWNERS SHOULD CONTACT MACK AT 1-610-709-3337.
Notes
MACK RECALL NO. SC0281.CUSTOMERS CAN ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-888-DASH-2-DOT (1-888-327-4236).
Check your 2003 Mack DM6 VIN
Not every recall applies to every VIN in a given year. Enter the 17-character VIN from your Mack DM6 at nhtsa.gov/recalls to see whether your specific vehicle has an unrepaired recall.
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