Model line

Mack MD

Every Mack MD model year on file, 2020 to 2027. Pick a year for its recalls, investigations, service bulletins and the full text of owner complaints.

Owner complaints, all model years20 involved a crash, fire, injury or death

Model years82020 to 2027

Recall campaigns9Distinct campaigns listing it

Service bulletins463Summed across model years

By model year

The 2023 model year drew the most complaints, 1, 50% of the model's total

Owner complaints filed with NHTSA, all years filed, by model year.

Source: NHTSA ODI. Complaints are not verified by NHTSA, and NHTSA publishes no sales volumes, so counts are not rates.

Components

Powertrain leads the Mack MD complaint record

Owner complaints across all model years, by component.

Powertrain

Brakes

Fuel system

Engine and cooling

Source: NHTSA ODI complaints file.

Model years

The record for each Mack MD model year

Peer index compares complaints with the median vehicle of the same model year and body class (100 is the median). It corrects for age, not for how many were sold.

Mack MD by model year
Year	Body	Complaints	Severity index	Peer index	Recalls	Bulletins
2027	Not decoded	0	None	None	0	5
2026	Not decoded	0	None	None	1	9
2025	Truck	1	0.0	100	2	20
2024	Not decoded	0	None	None	5	29
2023	Truck	1	0.0	100	2	69
2022	Not decoded	0	None	None	3	114
2021	Not decoded	0	None	None	2	112
2020	Not decoded	0	None	None	2	105

Source: NHTSA ODI. Body class from NHTSA's VIN decoder where decoded.

Latest recalls

Recent campaigns covering the Mack MD

25V-666 Oct 6, 2025
Seat belt anchorage bracket may be improperly welded
Seat belts · 16k vehicles
25V-333 May 21, 2025
Center bench seat belt assembly may be routed incorrectly
Seat belts · 42 vehicles
24V-333 May 14, 2024
Gross Axle Weight Rating (GAWR) listed on the vehicle certification label is incorrect, which can allow the vehicle to be overloaded
Equipment · 26 vehicles
24V-167 Mar 1, 2024
Park brake light may indicate the incorrect brake status due to an incorrect park brake pressure switch
Brakes · 117 vehicles
23V-746 Nov 7, 2023
Steering wheel attachment bolt may loosen and separate from the steering shaft, causing the steering wheel to detach
Steering · 74 vehicles
23V-605 Aug 30, 2023
Steering gear fasteners may not be properly tightened
Steering · 395 vehicles
22V-606 Aug 9, 2022
Engine control module (ECM) may experience an internal short-circuit, which can result in an unexpected engine shut down
Engine and cooling · 150 vehicles
21V-684 Sep 1, 2021
Cotter pin that retains the brake pedal clevis pin may not have been properly installed, which could result in an unsecured brake pedal
Brakes · 2,823 vehicles
21V-574 Jul 27, 2021
Spring hanger brackets on the front suspension may have loose bolts
Suspension · 60 vehicles

Source: NHTSA ODI recalls file.