2014 MACK MRU — Problems, Recalls & Safety Data
N/A
Safety Rating
0
Owner Complaints
7
Recalls
10
Service Bulletins
0
Investigations
Overview of the 2014 MACK MRU
The 2014 MACK MRU has received a total of 0 safety complaints filed with the National Highway Traffic Safety Administration (NHTSA). There have been 7 recall campaigns affecting this vehicle, covering issues with SERVICE BRAKES, AIR:ANTILOCK, ENGINE AND ENGINE COOLING:ENGINE, EXTERIOR LIGHTING:TURN SIGNAL:FLASHER UNIT. 10 technical service bulletins have been issued by Mack Trucks, Inc. for this model year.
Recalls for the 2014 MACK MRU
NHTSA has recorded 7 recalls for the 2014 MACK MRU, potentially affecting up to 54,644 vehicles.
Recall 25V030000 — SERVICE BRAKES, AIR:ANTILOCK
| 142 vehicles affected
Defect: 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: Driving without a functioning anti-lock brake system may result in the trailer not braking as intended, increasing the risk of a crash.
Remedy: 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.
View full details →Recall 15V275000 — ENGINE AND ENGINE COOLING:ENGINE
| 2,124 vehicles affected
Defect: 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...
Consequence: If engine oil comes into contact with a hot surface, there could be an increased risk of a fire.
Remedy: 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...
View full details →Recall 14V208000 — EXTERIOR LIGHTING:TURN SIGNAL:FLASHER UNIT
| 44,047 vehicles affected
Defect: 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: A failure of the hazard warning lights could reduce the trucks visibility, increasing the risk of a crash.
Remedy: 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...
View full details →Recall 14V137000 — ENGINE AND ENGINE COOLING:ENGINE
| 1,934 vehicles affected
Defect: 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: 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: 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...
View full details →Recall 13V619000 — SEAT BELTS
| 39 vehicles affected
Defect: 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...
Consequence: 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: 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...
View full details →Recall 13V492000 — POWER TRAIN:AXLE HUBS
| 1,155 vehicles affected
Defect: 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: If the nut comes loose, the hub assembly may separate from the vehicle, increasing the risk of a crash.
Remedy: 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.
View full details →Recall 13V195000 — SERVICE BRAKES
| 5,203 vehicles affected
Defect: 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...
Consequence: 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: 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...
View full details →Owner Complaints for the 2014 MACK MRU
No complaints have been filed with NHTSA for the 2014 MACK MRU.
Safety Rating for the 2014 MACK MRU
NHTSA has not yet tested the 2014 MACK MRU in its New Car Assessment Program.
Technical Service Bulletins for the 2014 MACK MRU
Mack Trucks, Inc. has issued 10 technical service bulletins (TSBs) for the 2014 MACK MRU. TSBs are notices sent by manufacturers to their dealers describing a known issue and the recommended repair procedure.
M-721-004 — SUSPENSION
2008 Document reformatted to be published as a TSB in Impact. Chassis lean.
KC-323 — STRUCTURE
Mack Chassis - Model MRU - Inner and Outer Door Panel Repair Procedure; Outer Door Surface Separating From The Inner Door Surface
K98892323 — EQUIPMENT
Diagnostic Trouble Codes ( DTC ) P20EE, P207F And P103C, Diagnostic Procedure - REPLACES GUIDED DIAGNOSTICS IN PREMIUM TECH TOOL ( PTT ) - US10+OBD2013 to US14+OBD2016 (Non-Common Rail) Emissions, Commonly Model Years 2014 To 2017
K23884537 — ENGINE AND ENGINE COOLING
Diagnostic Trouble Code (DTC) P04DB - Crankcase Ventilation Disconnected; US10+OBD13 To US14+OBD16 Emissions (Non-Common Rail Fuel System), Common Model Years 2014 To 2017
K63323104 — EQUIPMENT
Mack Chassis - Vibration Questionnaire, Driveline Angle Worksheet And Rough Ride Check Sheet
EC0017 — ENGINE
MACK Trucks has determined that certain 2013 through 2015 year model CHU, CXU, GU and MRU trucks equipped with a MP8 model engine may be equipped with an improperly functioning on-board emission-related diagnostic system.
FSB 221-010 — ENGINE AND ENGINE COOLING:ENGINE:DIESEL
DIAGNOSTIC TROUBLE CODES (DTCS), LOW OIL PRESSURE, CXU, GU, LEU, MRU.
884-007 — SEAT BELTS
MACK TRUCKS: TRUCKS MANUFACTURED FROM 06/04/2014-06/18/2014 REQUIRES TIGHTENING OF SEAT BELT BOLTS. NO REPORTS HAVE BEEN RECEIVED OF BELTS COMING DETACHED THIS IS A PROACTIVE MEASURE FOR THE SAFETY OF THE CUSTOMERS. *LJ
PI-0841 — ENGINE
MACK TRUCK: DUE TO MESSAGING SITUATION REGARDING INSTRUMENT CLUSTER AND ENGINE, THERE IS AN ACTIVE FAULT CODE, AND THE ENGINE HOURS IN THE INSTRUMENT CLUSTER IS NOT MATCHING THE ENGINE. MODEL 2013-2014 LEU, MRU. *PE
FSB-381-049 — ENGINE
MACK TRUCKS: INFORMATION PROVIDED REGARDING THE REPROGRAMMING OF THE INSTRUMENT CLUSTER DUE TO MESSAGE BEING TURNED OFF IN NEW ENGINE SOFTWARE. MODELS LEU, MRU. NO MODEL YEARS LISTED. *PE
NHTSA Investigations for the 2014 MACK MRU
There are no NHTSA defect investigations on record for this vehicle.
Other Model Years of the MACK MRU
- 2009 MACK MRU — 0 complaints
- 2010 MACK MRU — 0 complaints
- 2011 MACK MRU — 0 complaints
- 2012 MACK MRU — 0 complaints
- 2013 MACK MRU — 0 complaints
- 2014 MACK MRU (current)
- 2015 MACK MRU — 0 complaints
- 2016 MACK MRU — 0 complaints
- 2017 MACK MRU — 0 complaints
- 2018 MACK MRU — 1 complaint
Other MACK Models
- MACK MACK — 35 total complaints
- MACK ANTHEM (AN) — 12 total complaints
- MACK CXU612 — 12 total complaints
- MACK CX613 — 10 total complaints
- MACK GRANITE (GR) — 10 total complaints
- MACK CH600 — 9 total complaints
- MACK GU — 9 total complaints
- MACK RD — 8 total complaints