RoadVitals

2021 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.
2
Latest Sep 27, 2026
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.
5
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
0 injuries, 2 deaths reported

Overview

Our database contains 2 NHTSA owner-reported complaints for the 2021 Mack Anthem (an), most frequently naming the driver assistance and fuel system categories. 5 safety recalls have been issued covering this model year; and 228 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

  • Driver assistance150.0%
  • Fuel system150.0%

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

5 campaigns cover this model year

View all 5

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
22V401000

STEERING

Jun 7, 2022
5,644 units potentially affected
The defect: Mack Trucks, Inc. (Mack) is recalling certain 2021-22 Granite, Anthem, LR, Pinnacle, and Terrapro tractor trailers. The steering gears may have been assembled incorrectly, which can cause the gear to fracture.
The risk: A fractured steering gear can cause a loss of steering control, increasing the risk of a crash.
The remedy: Dealers will replace the steering gear, free of charge. Owner notification letters were mailed on July 29, 2022. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0437.
Mack Trucks, Inc.Manufacturer number SC0437View on NHTSA.gov

Recent owner complaints

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

Driver assistance
Filed Sep 27, 2026
Crash reported2 deaths reported

Driver 1 stated: “I was traveling in the right lane and going straight. The other truck was on the right shoulder. I was attempting to merge into the middle lane to provide additional space for the truck on the right shoulder. However, there was another vehicle in the middle lane, so I was unable to merge. I subsequently struck the truck that was stopped on the right shoulder.” Driver 2 stated: “We were on the right shoulder because the truck was experiencing mechanical issues. We were then struck from behind.” Investigation Findings The investigation revealed that Vehicle 1 (V1) and Vehicle 2 (V2) were traveling on the New Jersey Turnpike (NJTP) near milepost 99.5 in Elizabeth County. Vehicle 2 was stopped on the right shoulder due to mechanical issues. Driver 1 failed to maintain proper directional control of Vehicle 1 and subsequently struck the rear of Vehicle 2, which was stopped on the shoulder. A passenger in Vehicle 2 complained of neck and back pain but declined medical attention at the scene. Both vehicles were towed from the scene by Highway Towing, AIS 208.

NHTSA ID
11767258
Incident
May 6, 2026
Fuel system
Filed Jul 24, 2023

The secondary fuel filter housing broke causing the truck to shut off while driving.

NHTSA ID
11534072
Incident
Jul 24, 2023

Manufacturer communications

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

TSB M-258-015A 202610

ENGINE; FUEL/PROPULSION SYSTEM

All Mack vehicles built with USA17, and forward emissions may experience damage to the diesel exhaust fluid pump harness due to wicking of DEF into the pump connector and harness. To prevent this issue an anti-wicking harness has been developed.

CBR 159 202608

ELECTRICAL SYSTEM

Mack Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC) During Engine Pre-heat (Intake Air Heater) Operation - Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer

CBR 2575-1 202604

STRUCTURE:BODY

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

CBR 2362-3 202604

POWER TRAIN

CBR - Mack Carrier Nut Adhesive Change.

CBR 2573-1 202604

POWER TRAIN

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

CBR 2712-7 032026

ELECTRICAL SYSTEM

CBR - No Start Condition After Over the Air Programing.

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—
2021Viewing250—
2020460—
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.