RoadVitals

2020 Mack Anthem (an)

Recalls, owner-reported complaints, investigations and safety data

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
4
+1 complaint in 30 days
Safety recallsA safety recall is issued when a manufacturer or NHTSA determines that a vehicle has a safety-related defect or does not comply with a federal motor vehicle safety standard. Recall repairs are free. Whether a specific vehicle is covered depends on its VIN — a recall listed for a model year does not necessarily apply to every vehicle of that year.
6
Latest Oct 6, 2025
InvestigationsNHTSA opens an investigation to examine whether a safety defect may exist. An open investigation is not a determination that a defect exists, and many investigations close without a recall. Investigations can, however, lead to one.
0
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
1

Overview

Our database contains 4 NHTSA owner-reported complaints for the 2020 Mack Anthem (an), most frequently naming the airbags, brakes and exterior lighting categories. 6 safety recalls have been issued covering this model year; and 268 manufacturer communications are on file.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

What owners report

Complaints grouped by the component NHTSA recorded

  • Airbags114.3%
  • Brakes114.3%
  • Exterior lighting114.3%
  • Other / unspecified114.3%
  • Powertrain (other)114.3%
  • Steering114.3%
  • Suspension114.3%

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Safety recalls

6 campaigns cover this model year

View all 6

Recalls apply to specific vehicles, not to every vehicle of a model year. Check your VIN with NHTSA or your manufacturer's dealer to confirm whether a recall affects your vehicle.

Check a VIN on NHTSA.gov
25V666000

SEAT BELTS:FRONT:ANCHORAGE

Oct 6, 2025
15,841 units potentially affected
The defect: 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."
The risk: An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.
The 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 NHTSA.gov beginning October 13, 2025.
Mack Trucks, Inc.Manufacturer number SC0485View on NHTSA.gov
24V792000

ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE

Oct 23, 2024
59,338 units potentially affected
The defect: Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Anthem, Granite, TerraPro and Pinnacle vehicles, equipped with Bendix EC80 Advanced Electronic Control Units (ECU). Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop working.
The risk: Safety systems that depend on the ECU (Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System) may have diminished or lost functionality, increasing the risk of a crash.
The remedy: Dealers will reprogram the ECU software, free of charge. Owner notification letters were mailed December 9, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0472.
Mack Trucks, Inc.Manufacturer number SC0472View on NHTSA.gov
21V233000

ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE:SOFTWARE

Apr 1, 2021
557 units potentially affected
The defect: Mack Trucks, Inc. (Mack) is recalling certain 2018-2022 Anthem (AN), Granite (GR/GU), and Pinnacle (CHU/CXU/PI) vehicles equipped with "camelback" rear suspension and electronic stability control. The vehicles may not stay in their lane at certain speeds. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 136, "Electronic Stability Control Systems on Heavy Vehicles."
The risk: A vehicle that drifts out of its lane increases the risk of a crash.
The remedy: Mack will notify owners, and dealers will reprogram the vehicle control units, free of charge. The recall began on April 21, 2021. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0423.
Mack Trucks, Inc.Manufacturer number SC0423View on NHTSA.gov

Recent owner complaints

Reports submitted to NHTSA, shown in the owner's own words

Other / unspecifiedPowertrain (other)Suspension
Filed Jul 21, 2026

This vehicle was sold to me as a new truck by Mountain West Truck Center in Salt Lake City, UT, with Federal Excise Tax paid accordingly. Prior to sale, the truck had undergone structural frame repair at Tec Equipment, an authorized Mack/Volvo dealer and repair facility in Reno, Nevada. During that repair, Huck bolts — permanent, engineered structural fasteners used to secure the frame and axle assemblies to OEM specification — were removed and replaced with non-equivalent standard threaded bolts. Those substitute fasteners were not properly installed. This condition was not disclosed at the time of sale. Nature of the Safety Defect Huck bolts are permanent, high-clamp-load fasteners engineered for critical structural joints in heavy-duty commercial vehicles. They function through a swaging process — a permanent mechanical crimp creating an interference fit engineered to withstand heavy vibration and dynamic load. They are not interchangeable with standard threaded fasteners. When the failure manifested on Truck #35, the vehicle was unable to move and drive unless the axle lock was engaged. It exhibited clunking from the transmission and speedometer dropout — symptoms consistent with loss of driveline integrity. Teardown by Mountain West technicians revealed a broken left-side axle shaft and gear metal in the front differential fluid, indicating differential destruction caused by axle instability. The rear axle was essentially floating, unsecured from the frame. The axle was missing several bolts and many were finger tight or loose. This safety failure resulted in a serious highway breakdown incident endangering other motorists, This failure presents a clear and foreseeable risk of axle separation or driveline failure at highway speed with no warning. The truck was operated in normal commercial service prior to discovery of this condition.

NHTSA ID
11751705
Incident
Mar 20, 2026
AirbagsSteering
Filed Dec 29, 2025
Crash reported

While driving on the Interstate I apparently lost control and hit a guardrail at approx 40-45mph. The impact stopped the truck causing severe damage to the vehicle the front right 1/2 of the vehicle including bumper, quarter panel with enough impact to break the front axle. I was found unconsious and spent 6 days in the hospital. I have fractures in my back and believe that possibly the airbag should have deployed? The vehicle is available at this time for inspection. I have sent notification to the manufacturer. The day prior to this accident the check ECU light came on, however it did turn off later that day. I

NHTSA ID
11707679
Incident
Dec 10, 2025
Exterior lighting
Filed Mar 9, 2020

LED MARKER LAMPS ARE IN A SEALED UNIT WHICH ARE NOT SERVICEABLE ROADSIDE, LEADING TO LOW VISIBILITY UNDER CERTAIN LIGHTING AND APPROACH CONDITIONS TO OTHER VEHICLES. ALSO CREATES VIOLATIONS WHILE ON THE ROAD UNDER SECTION 393 AS THE DRIVER AND/ OR ROAD SERVICE VENDOR CANNOT SERVICE A PART WITHOUT RETURNING TO A DEALER OR STOCKING SUPPLIER. THIS IS DANGEROUS BOTH IN TRAVELING AND STATIONARY POSITIONS.

NHTSA ID
11316944
Incident
Mar 9, 2020
Mileage
35,000 mi
Brakes
Filed Nov 26, 2019

TL* THE CONTACT OWNS A 2020 MACK ANTHEM. THE CONTACT STATED THAT EACH TIME THE BRAKE PEDAL WAS DEPRESSED, THE VEHICLE MOVED FROM SIDE TO SIDE, THE WHEELS WOULD JUMP, AND THE HOOD ATTEMPTED TO OPEN. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE CONTACT STATED THAT THE VEHICLE WAS TAKEN TO NEXTRAN TRUCK CENTERS (2200 W LANDSTREET RD, ORLANDO, FL 32809, (407) 855-1200) WHERE THE DRUM, BRAKE LINE, AND BRAKE ADJUSTMENTS WERE COMPLETED. THE VEHICLE WAS REPAIRED. THE CONTACT ALSO STATED THAT THE VEHICLE WAS TAKEN ON THREE DIFFERENT OCCASIONS TO THE SAME DEALER FOR THE SAME FAILURE, BUT THE FAILURE RECURRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND PROVIDED CASE NUMBER: 12139296. THE FAILURE MILEAGE WAS APPROXIMATELY 28,000.

NHTSA ID
11282437
Incident
Jul 2, 2019
Mileage
28,000 mi

Manufacturer communications

A bulletin sent by a manufacturer to its dealers. Not a recall, and repairs are not necessarily free.

CBR 2575-1 202604

STRUCTURE:BODY

CBR - Mack Chassis - Dash Panel Cracking at Mounting to BIW.

CBR 2573-1 202604

POWER TRAIN

CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.

CBR 2362-3 202604

POWER TRAIN

CBR - Mack Carrier Nut Adhesive Change.

M0039 032026

ENGINE

Emissions - EC0039 MST21 Failure to Detect P20EE - AN, CHU.

CBR 2246-5 032026

SUSPENSION

CBR - Z Spring Bracket Wear.

CBR 2432-2 202601

STRUCTURE:BODY; VISIBILITY/WIPER

CBR - Mack Chassis - AN And GR Models - Door Glass Shattering.

Manufacturers file copies of the bulletins they send to dealers with NHTSA. These often describe diagnostic or repair procedures for a known condition. They are not recalls: repairs described in a bulletin are usually only free if the vehicle is still under warranty or the manufacturer has extended coverage.

Compare model years

Complaint and recall counts across every year of this model

Mack Anthem (an) by model year
YearComplaintsRecallsInvestigationsIssue Index
2027000—
2026010—
2025080—
2024560—
2023030—
2022050—
2021150—
2020Viewing460—
2019160—
2018040—
2017000—
2016000—

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers. Older model years have had longer for reports to accumulate.