2020 Mack MD Problems: 0 Complaints, 2 Recalls

The worst 2020 Mack MD problems

Ranked by number of owner complaints. Mileage and cost come from what owners wrote.

Tap a problem to see which part fails, at what mileage and in which other years.

Seat belts: front: anchorageReported October 6, 2025 · 15,841 vehicles affected

What is wrong: 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."
Risk: An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.
Remedy: 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 beginning October 13, 2025.

Recall number 25V666000 · Recall details

Service brakes, hydraulic: pedals and linkagesReported September 1, 2021 · 2,823 vehicles affected

What is wrong: 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.
Risk: An unsecured brake pedal can cause a loss of braking ability and increase the risk of a crash.
Remedy: Owners are advised to not drive their vehicles until the remedy has been performed. Dealers will inspect the cotter pin installation and repair it as necessary, free of charge. Owner notification letters were mailed on September 13, 2021. Owners may contact Mack's customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0429.

Recall number 21V684000 · Recall details

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

Used buying checklistWhat to check on a 2020 Mack MD before you buy

Is the 2020 Mack MD reliable?

Owners have filed 0 complaints about the 2020 Mack MD.

What is the most common problem with the 2020 Mack MD?

There are not enough complaints to tell.

How many recalls does the 2020 Mack MD have?

2 recalls, covering seat belts and service brakes, hydraulic.

See the problems and recalls for an exact car

Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.