What Mack CXU owners have reported to NHTSA, the service bulletins the manufacturer sent dealers, and any federal defect investigations, by model year. See Mack CXU safety recalls or check your VIN.
Complaints owners filed with NHTSA, by the model year of the vehicle. A high count can also mean a popular year, so compare it with how many were sold.
| Year | Complaints | Crashes | Fires | Injured | Deaths | TSBs |
|---|---|---|---|---|---|---|
| 2018 | 0 | 0 | 0 | 0 | 0 | 301 |
| 2017 | 0 | 0 | 0 | 0 | 0 | 299 |
| 2016 | 1 | 0 | 0 | 0 | 0 | 305 |
| 2015 | 0 | 0 | 0 | 0 | 0 | 281 |
| 2014 | 0 | 0 | 0 | 0 | 0 | 253 |
| 2013 | 0 | 0 | 0 | 0 | 0 | 205 |
| 2012 | 0 | 0 | 0 | 0 | 0 | 185 |
| 2011 | 0 | 0 | 0 | 0 | 0 | 176 |
| 2010 | 1 | 0 | 1 | 1 | 0 | 223 |
The vehicle systems named most often in Mack CXU complaints (one complaint can name several).
In the owners’ own words, as filed with NHTSA. Unverified reports; NHTSA removes personal details before publishing.
Second occurrence of below happening, first time being 11/28/25, and most recently 11/05/25. Clutch engaged uncommanded while stopped with service brakes engaged. Truck kept trying to power through the service brakes until it was forcefully stalled out with service brakes. Truck is start-able immediately afterwards, but not drivable with engine stop warning lamp illuminated and a error message "Neutral Gear Not Secured" Nearly rear ended a stopped vehicle in front of truck, so yeah, slight safety concern of uncommanded movement of vehicle. Has not been looked at by independent shop or manafacterer, nothing has been inspected, mechanics within company vehicle is operated by currently resea…
A 2010 MACK TRUCK TRACTOR EQUIPPED WITH A DIESEL PARTICULATE FILTER TYPE EXHAUST SYSTEM SPONTANEOUSLY CAUGHT FIRE WHILE IN REGENERATION MODE AS THE VEHICLE WAS TRAVELING DOWN AN INTERSTATE HIGHWAY. FIRE CONSUMED THE CAB OF THE TRUCK RESULTING IN A TOTAL LOSS TO THE VEHICLE. DRIVER OF VEHICLE SUFFERED BURNS AND SMOKE INHALATION INJURIES IN AN ATTEMPT TO PUT THE FIRE OUT.
Repair instructions and other communications the manufacturer sent dealers about known issues. A TSB is not a recall, and the repair is usually free only while the car is under warranty; ask your dealer for the bulletin number.
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
Mack Trucks has determined that certain vehicles equipped with a model year (âMYâ) 2017-2018 MP8 Turbo Compound (TC) engine may not meet California and Federal Regulations (CARB). This Recall is for updated software that will reduce the amount of time necessary for the system to operate in a cold engine warm-up strategy and provide health monitoring of the Selective Catalyst Reduction (SCR).
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR - Mack Carrier Nut Adhesive Change.
CBR - Z Spring Bracket Wear.
CBR - The purpose of this solution is to give information on Engine Control Module (EMS) Software content.
Emissions - Mack Trucks has determined that certain vehicles equipped with a model year (âMYâ) 2017-2018 MP7 engine may not meet California and Federal Regulations (CARB).
CBR - Mack Chassis - Engine Brake Only Works With The Brake Pedal, No Function During Cruise. US07 And Newer Emissions, Model Year 2008 And Newer.
CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4) and PR(4)).
CBR - Mack Temperature Sensor Troubleshooting Guide
CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit GPS location data.
CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
NHTSA’s Office of Defects Investigation opens these when complaints point to a possible safety defect. Many end in a recall.
On April 28, 2020, the Office of Defects Investigation (ODI) opened PE20-005 to investigate reports of 2013-2015 Mack CHU and CXU trucks equipped with mDrive transmissions continuing to push forward when stopping, possibly increasing the risk of a crash. After more field reports were discovered, the scope of the investigation was expanded to cover MY 2013-2016 vehicles. The mDrive transmission is Mack's version of Volvo's I-Shift transmission, an automated manual transmission that allows gear sh
On October 3rd 2010 the Office of Defects Investigation (ODI) received two complaints on 2009 - 2010 Mack CXU612 and CXU trucks for failing bolts that clamp the 5th wheel to the frame of the truck. On January 19, 2011 ODI opened this Preliminary Evaluation. During the course of the investigation ODI took possession of fasteners from the field. These fasteners, taken off subject complaint vehicles, exhibited 'hourglass like stretching' indicating plastic deformation. This same source supplied ODI wi
Source: NHTSA Office of Defects Investigation public data (complaints, manufacturer communications, investigations), model years 2010 and later. Had a safety problem? Report it to NHTSA.
In complaints filed with NHTSA for model years 2010–2018, owners most often name: engine, power train. 2 complaints are on record.
No. A complaint is an unverified report from an owner. A technical service bulletin (TSB) is the manufacturer telling dealers how to fix a known issue; it is not a safety recall and is usually covered only under warranty. A recall is a formal safety action, and its repair is free.
File a vehicle safety complaint at NHTSA.gov. NHTSA reads every report, and patterns of complaints are what open defect investigations and, eventually, recalls.