Recall Register

2014 Mack MRU: recalls and complaints

NHTSA lists 7 recall campaigns for the 2014 Mack MRU. The newest campaign is 25V030000. NHTSA received the report on 23 Jan 2025. The NHTSA record gives the component Service Brakes, Air / Antilock. NHTSA has no complaint on file for this model year.

The NHTSA recall file shows no do-not-drive advisory and no park-outside advisory on these campaigns.

This page cannot show if a recall applies to one vehicle. The NHTSA VIN lookup shows the unrepaired recalls of one vehicle.

Remedy of the newest campaign, 25V030000, in the NHTSA record

Dealers will add an ABS warning light and circuitry, free of charge. Owner notification letters were mailed April 28, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0474.
NHTSA VIN lookup

Complaint information entered into NHTSA’s Office of Defects Investigation vehicle owner's complaint database is used with other data sources to identify safety issues that warrant investigation and to determine if a safety-related defect trend exists.

NHTSA publishes these words. Source: NHTSA Datasets and APIs, section Complaints, read on . Complaint file through . Recall file through .

Since the last update

No tracked figure of this page changed in a data update. What the log tracks

All updates to the register

Recall campaigns

7 campaigns, newest first. 54,644 units in total.

  • 25V030000Service Brakes, Air / Antilock
  • 15V275000Engine and Engine Cooling / Engine
  • 14V208000Exterior Lighting / Turn Signal / Flasher Unit
  • 14V137000Engine and Engine Cooling / Engine
  • 13V619000Seat Belts
  • 13V492000Power Train / Axle Hubs
  • 13V195000Service Brakes

  1. 25V030000Received . 142 units.

    Service Brakes, Air / Antilock

    Defect, in the NHTSA record
    Mack Trucks, Inc. (Mack) is recalling certain 2010-2018 MRU and 2019-2025 Terrapro towing vehicles. The vehicles are missing the anti-lock brake (ABS) warning light and circuitry that controls the anti-lock brake function for an attached trailer. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Brake Systems."
    Consequence, in the NHTSA record
    Driving without a functioning anti-lock brake system may result in the trailer not braking as intended, increasing the risk of a crash.
    Remedy, in the NHTSA record
    Dealers will add an ABS warning light and circuitry, free of charge. Owner notification letters were mailed April 28, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0474.

    Report filed by Mack Trucks, Inc.. Manufacturer campaign number SC0474. Owner notification date in the NHTSA record: .

  2. 15V275000Received . 2,124 units.

    Engine and Engine Cooling / Engine

    Defect, in the NHTSA record
    Mack Trucks, Inc. (Mack) is recalling certain model year 2011-2016 Mack MRU and LEU trucks manufactured June 25, 2010, to April 30, 2015, and 2015-2016 LR6 trucks manufactured from December 18, 2014 through March 6, 2015. Excessive engine crankcase pressures may cause the 90-degree elbow of the vent tube assembly to detach from the crankcase ventilation breather, possibly allowing engine oil to come into contact with hot surfaces.
    Consequence, in the NHTSA record
    If engine oil comes into contact with a hot surface, there could be an increased risk of a fire.
    Remedy, in the NHTSA record
    Cummins will notify owners on behalf of Mack, and Cummins service centers will administer the repairs which include securing the ends of the 90-degree elbow and reprogramming the electronic control module (ECM) with software that can adjust the engine output under misfire conditions to limit crankcase pressures. These repairs will be performed free of charge. The recall began on June 12, 2015. Owners may contact Mack customer service at 1-800-528-6586 or Cummins Inc. at 1-800-343-7357. Mack's number for this recall is SC0391.

    Report filed by Mack Trucks, Inc.. Manufacturer campaign number SC0391. Owner notification date in the NHTSA record: .

  3. 14V208000Received . 44,047 units.

    Exterior Lighting / Turn Signal / Flasher Unit

    Defect, in the NHTSA record
    Mack Trucks Inc. (Mack) is recalling certain model year 2010-2014 CHU, CXU, and MRU, 2007 CT and CV, 2008-2014 GU, and 2011-2014 LEU, and TD trucks manufactured February 28, 2006, through November 8, 2013, and equipped Hamsar Electronic Flasher. The hazard warning lights may fail.
    Consequence, in the NHTSA record
    A failure of the hazard warning lights could reduce the trucks visibility, increasing the risk of a crash.
    Remedy, in the NHTSA record
    Mack will notify owners, and dealers will replace the electronic flasher unit, free of charge. The recall will begin by mid-June 2014. Interim letters went out to owners on June 23, 2014. The recall began on July 25, 2014. Owners may contact Mack customer service at 1-866-298-6586. Mack's number for this recall is SC0379.

    Report filed by Mack Trucks, Inc.. Manufacturer campaign number SC0379. Owner notification date in the NHTSA record: .

  4. 14V137000Received . 1,934 units.

    Engine and Engine Cooling / Engine

    Defect, in the NHTSA record
    Mack Trucks Inc. (Mack) is recalling certain model year 2014-2015 CXU, 2010-2015 LEU, and 2011-2015 MRU vehicles manufactured with certain Cummins Westport Model ISL G and ISX12 G engines. Condensation in the intake manifold may freeze during cold weather conditions and interfere with the proper operation of the intake manifold pressure sensor.
    Consequence, in the NHTSA record
    The improper operation of the sensor could induce elevated exhaust temperatures or flames from the exhaust pipe, increasing the risk of a vehicle fire or burn injury to a person near the exhaust pipe.
    Remedy, in the NHTSA record
    Cummins and Cummins Westport will notify owners, and authorized Cummins service facilities will upload a new ECM calibration, free of charge. The recall began on March 12, 2014. Customers may contact Mack at 1-336-393-2000 or Cummins Inc. at 1-800-343-7357. Mack's number for this recall is SC0377.

    Report filed by Mack Trucks, Inc.. Manufacturer campaign number SC0377.

  5. 13V619000Received . 39 units.

    Seat Belts

    Defect, in the NHTSA record
    Mack Trucks, Inc. (Mack) is recalling certain model year 2014 CXU and MRU trucks manufactured August 12, 2013, through October 9, 2013 and equipped with IMMI-brand L9 seat belt buckles. When the button is pressed to release the seat belt, the latch plate can become partially engaged with the buckle, making the seat belt difficult to unlatch. Thus, these vehicles fail to conform to the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 209, "Seat Belt Assemblies."
    Consequence, in the NHTSA record
    If the latch plate remains partially engaged after the button is pressed, egress from the vehicle could be hindered which would increase the risk of injury in the event of an emergency.
    Remedy, in the NHTSA record
    Mack will notify owners, and dealers will inspect the seat belt buckle, and if necessary, replace the seat belt buckles, free of charge. The recall began on January 30, 2014. Owners may contact Mack Trucks at 1-336-393-2000. This is Mack Recall No. SC0373.

    Report filed by Mack Trucks, Inc.. Manufacturer campaign number SC0373. Owner notification date in the NHTSA record: .

  6. 13V492000Received . 1,155 units.

    Power Train / Axle Hubs

    Defect, in the NHTSA record
    Mack Trucks is recalling certain model year 2013-2014 CHU, CXU, GU, LEU, and MRU vehicles manufactured with pro-torque axle spindle nuts from August 28, 2012, through August 16, 2013. The pro-torque nut may not have been installed correctly, which may result in a loosening of the nut.
    Consequence, in the NHTSA record
    If the nut comes loose, the hub assembly may separate from the vehicle, increasing the risk of a crash.
    Remedy, in the NHTSA record
    Mack Trucks will notify owners, and dealers will inspect and repair the vehicles, as necessary, free of charge. The recall began on November 12, 2013. Mack's recall number is SC0371. Owners may contact Mack Trucks at 1-336-393-2000.

    Report filed by Mack Trucks, Inc.. Manufacturer campaign number SC0371. Owner notification date in the NHTSA record: .

  7. 13V195000Received . 5,203 units.

    Service Brakes

    Defect, in the NHTSA record
    Mack Trucks, Inc. is recalling certain model year 2013-2014 CHU, CXU, GU, MRU, and LEU trucks manufactured July 16, 2012, through march 18, 2013 and equipped with drum brakes. The clevis pin for the brake slack adjuster may be missing a cotter pin. If the cotter pin is not installed, the clevis pin may loosen and fall out causing a loss of brake function on the affected wheel.
    Consequence, in the NHTSA record
    A loss of brake function at one wheel will lead to increased stopping distances and pulling to the left or right when braking, which may increase the risk of a crash.
    Remedy, in the NHTSA record
    Mack Trucks, Inc. will notify owners, and dealers will inspect the brake slack adjusters and install the brake hardware, as necessary, free of charge. An interim was mailed to owners on June 20, 2013. A second notice was mailed to owners on September 30, 2013. Owners may contact Mack Trucks at 1-800-528-6586. Mack Trucks' recall campaign number is SC0370.

    Report filed by Mack Trucks, Inc.. Manufacturer campaign number SC0370. Owner notification date in the NHTSA record: .

The campaign number opens the NHTSA record. Each quotation is the text of the NHTSA recall file.

Recall campaign: One recall in the NHTSA recall file, with one campaign number. A campaign can name many makes, models and model years.

Units: The number of vehicles or products that a recall can include. The manufacturer or the firm reports the number to the agency.

Complaints by component

The NHTSA complaint file has no complaint for this model year.

Investigations

The NHTSA investigation file has no investigation that names this model year.

Investigation: A study of a possible safety defect by the NHTSA Office of Defects Investigation. An investigation with no closing date in the NHTSA file is open.

Other model years

The number under each year is the number of recall campaigns.

  1. 20085
  2. 20097
  3. 20107
  4. 201110
  5. 20129
  6. 20136
  7. 20147
  8. 20153
  9. 20162
  10. 20171
  11. 20181

A year without a link has fewer than 2 campaigns and fewer than 25 complaints. It has no page.

Official channels

Cite this page

Recall Register. 2014 Mack MRU: recalls and complaints. https://recallregister.com/vehicle/mack/mru/2014/. Source: NHTSA Office of Defects Investigation, recall, complaint and investigation files. Data through .

Sources

Source
NHTSA Office of Defects Investigation
Licence
US government work, public domain
Recall file through
29 Sep 2026
Complaint file through
15 May 2019
First complaint in the file
1 Jan 1995
Manufacturer in the recall file
Mack Trucks, Inc.

The NHTSA record is the authority. A complaint count is the number of different complaint numbers for the make, the model and the model year. How the register is made. Report an error.

Questions

How many units are in the recall campaigns for the 2014 Mack MRU?
54,644 units in 7 campaigns. A campaign can name other models and model years, and its units include them.
How many recall campaigns does the Mack MRU have for all model years?
NHTSA lists 18 recall campaigns for the Mack MRU, model years 2008 to 2018. 7 of them name the 2014 model year.
Is an NHTSA investigation of the 2014 Mack MRU open?
The NHTSA investigation file has no investigation that names this model year.