Mack Trucks, Inc. (Mack) is recalling certain 2024 MD6 and MD7 vehicles. The park brake light may indicate the incorrect brake status due to an incorrect park brake pressure switch.
Covers2024 Mack MD
Brakes
Mack MD Brake problems by year
2 complaints filed with NHTSA about the Mack MD's brakes. Spongy or hard pedal, ABS faults, brake failure, noises, parking brake and brake fluid leaks.
Brake complaints by model year
Brake recalls
Do not drive
Mack Trucks, Inc. (Mack) is recalling certain 2020-2022 Mack MD vehicles. The cotter pin that retains the brake pedal clevis pin may not have been properly installed, which could result in an unsecured brake pedal.
Latest MD brake complaints
On October 7, 2026, our commercial truck underwent a vehicle inspection that identified serious concerns involving the air brake system, including air leakage, air pressure loss, and an issue with the air system breather. These defects raise significant safety concerns because improper air pressure in a commercial truck's braking system could compromise braking performance, potentially resulting in loss of braking capability, a serious collision, severe injuries, or fatalities. We have attempted to resolve these...
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issues through Western Truck Center, at West Sacramento an authorized Mack Trucks dealership. Unfortunately, despite our efforts, the problems have not been satisfactorily addressed, and we have been unable to obtain a clear resolution. We are extremely concerned about the potential risk this presents to our drivers and other motorists. A commercial truck operating with a defective air brake system could pose a serious danger on public highways. We are requesting that NHTSA investigate this potential safety defect and determine whether corrective action is necessary to prevent a potentially catastrophic accident.
[[redacted]] - 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...
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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)
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data