Vehicle Safety Data

2011 MACK MRU — Problems, Recalls & Safety Data

Check any vehicle history by VIN - Free vehicle history report

N/A

Safety Rating

0

Owner Complaints

10

Recalls

ACTIVE RECALL

10

Service Bulletins

0

Investigations

Overview of the 2011 MACK MRU

The 2011 MACK MRU has received a total of 0 safety complaints filed with the National Highway Traffic Safety Administration (NHTSA). There have been 10 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 2011 MACK MRU

NHTSA has recorded 10 recalls for the 2011 MACK MRU, potentially affecting up to 60,547 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 12V067000 — SUSPENSION:FRONT

| 4,032 vehicles affected

Defect: MACK IS RECALLING CERTAIN MODEL YEAR 2009-2011 MRU AND MODEL YEAR 2010-2011 LEU VEHICLES, MANUFACTURED FROM JANUARY 1, 2009, THROUGH SEPTEMBER 30, 2010 BECAUSE THE FRONT AXLE MAY CRACK AND FRACTURE.

Consequence: COMPLETE FRACTURES CAN CAUSE THE DRIVER TO LOSE CONTROL OF THE VEHICLE, INCREASING THE RISK OF A CRASH.

Remedy: MACK WILL NOTIFY OWNERS, AND REPLACE THE AXLE BEAMS ON AFFECTED VEHICLES WHEN SUFFICIENT QUANTITIES ARE AVAILABLE. AS AN INTERIM MEASURE, A MAG PARTICLE INSPECTION WILL BE PROVIDED TO MITIGATE RISK AND IDENTIFY VEHICLES WITH CRACKED AXLE BEAMS. THIS SERVICE...

View full details →

Recall 12V096000 — ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

| 318 vehicles affected

Defect: MACK IS RECALLING CERTAIN MODEL YEAR 2010-2012 LEU AND MODEL YEAR 2011-2012 MRU VEHICLES, MANUFACTURED FROM MAY 14, 2009, THROUGH OCTOBER 31, 2011, AND BUILT TO OPERATE ON COMPRESSED NATURAL GAS. ON THESE VEHICLES THE ALTERNATOR GROUND CABLE RUNS DIRECTLY TO THE STARTER, WHICH DEFEATS THE CIRCUIT PROTECTION.

Consequence: IN THE EVENT OF AN ELECTRICAL SHORT, A VEHICLE FIRE MAY RESULT.

Remedy: MACK WILL NOTIFY OWNERS, AND DEALERS WILL RELOCATE THE ALTERNATOR GROUND CABLE TO THE ENGINE GROUND STUD. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE RECALL BEGAN ON APRIL 19, 2012. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-866-1177.

View full details →

Recall 11V374000 — STEERING:GEAR BOX:SHAFT SECTOR

| 2,294 vehicles affected

Defect: MACK TRUCKS IS RECALLING CERTAIN MODEL YEAR 2009-2012 MRU HEAVY TRUCKS MANUFACTURED FROM NOVEMBER 26, 2008, THROUGH APRIL 26, 2011. THE BOLTS USED TO MOUNT THE STEERING GEAR WERE NOT TIGHTENED TO SPECIFICATION. THE BOLTS CAN LOOSEN WHICH OVER TIME MAY CAUSE THE STEERING GEAR TO DISCONNECT FROM ITS MOUNTING BRACKET.

Consequence: A COMPLETE LOSS OF STEERING MAY OCCUR INCREASING THE RISK OF A VEHICLE CRASH.

Remedy: DEALERS WILL REPLACE THE BOLTS, WHICH WILL BE TIGHTENED TO THE CORRECT SPECIFICATION. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON SEPTEMBER 19, 2011. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-866-1177.

View full details →

Recall 11V272000 — SERVICE BRAKES, AIR:SLACK ADJUSTERS:AUTOMATIC

| 1,524 vehicles affected

Defect: MACK TRUCKS IS RECALLING CERTAIN MODEL YEAR 2011-2012 CHU, CXU, GU, LEU AND MRU TRUCKS MANUFACTURED FROM OCTOBER 15, 2010, THROUGH JANUARY 31, 2011, AND EQUIPPED WITH GUNITE AUTOMATIC SLACK ADJUSTERS. DUE TO AN INCOMPLETE "KNITTING" OF THE IRON AT THE TIME OF CASTING, INADEQUATE STRUCTURAL INTEGRITY OF THE SLACK ADJUSTER HOUSING CAN OCCUR, WHICH COULD CAUSE THE HOUSING TO...

Consequence: SLACK ADJUSTERS WITH THIS FLOW NOTCH COULD CRACK UNDER NORMAL BRAKING CONDITIONS CAUSING LOSS OF BRAKING WHICH COULD RESULT IN A VEHICLE CRASH.

Remedy: MACK TRUCKS WILL NOTIFY OWNERS AND DEALERS WILL REPLACE THE SUBJECT SLACK ADJUSTERS FREE OF CHARGE. THE SAFETY RECALL BEGAN ON AUGUST 24, 2011. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-528-6586.

View full details →

Recall 11V212000 — ELECTRICAL SYSTEM

| 3,763 vehicles affected

Defect: MACK TRUCKS IS RECALLING CERTAIN MODEL YEAR 2008-2012 MRU AND LEU HEAVY TRUCKS MANUFACTURED FROM JANUARY 3, 2007, THROUGH FEBRUARY 3, 2011. THE ELECTRICAL CIRCUITRY IN THESE VEHICLES MAY NOT PROVIDE ADEQUATE OVERCURRENT PROTECTION.

Consequence: IN THE EVENT OF AN ELECTRICAL OVERAGE, THE FUSE THAT SHOULD PREVENT THE OVER CURRENT FROM REACHING THE MIRROR SWITCH CIRCUIT MAY FAIL, SUCH THAT THE MIRROR SWITCH CAN OVERHEAT. AN OVERHEATED SWITCH COULD CAUSE A VEHICLE FIRE.

Remedy: DEALERS WILL INSTALL A RELAY HARNESS TO PREVENT THE MIRROR SWITCH FROM OVERHEATING. THEY WILL ALSO INSPECT THE MIRROR SWITCH AND IF SIGNS OF OVERHEATING ARE SHOWN, REPLACE THAT SWITCH. ALL INSPECTIONS AND REPAIRS WILL BE PERFORMED FREE OF CHARGE....

View full details →

Recall 10V404000 — SERVICE BRAKES, AIR

| 369 vehicles affected

Defect: MACK IS RECALLING CERTAIN MODEL YEAR 2008 THROUGH 2011 GU AND MRU MODEL VEHICLES MANUFACTURED WITH A FRONT TOW GLAD HAND OPTION. THE ACTUATION AND RELEASE TIMING OF THE VEHICLES EXCEEDS THE LIMIT WHICH FAILS TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS."

Consequence: IF THE BRAKES DO NOT PERFORM AS THEY SHOULD, A VEHICLE CRASH COULD OCCUR.

Remedy: MACK WILL NOTIFY OWNERS AND REPAIR THE VEHICLE FREE OF CHARGE. THE SAFETY RECALL BEGAN ON FEBRUARY 1, 2011. OWNERS MAY CONTACT MACK AT 1-877-800-4945.

View full details →

Owner Complaints for the 2011 MACK MRU

No complaints have been filed with NHTSA for the 2011 MACK MRU.

Safety Rating for the 2011 MACK MRU

NHTSA has not yet tested the 2011 MACK MRU in its New Car Assessment Program.

Technical Service Bulletins for the 2011 MACK MRU

MACK TRUCKS, INC has issued 10 technical service bulletins (TSBs) for the 2011 MACK MRU. TSBs are notices sent by manufacturers to their dealers describing a known issue and the recommended repair procedure.

CBR-2139 202405 — ENGINE

CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil. It is possible that the source of the fuel is the rear fuel galley plug in the cylinder head. A new and improved fuel galley plug has been developed to resolve this...

KC-363 — EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS

Mack Chassis - FSB 392 - 004 - Radio, Replacement

FSB 217-004 — ENGINE

OIL PAN SEALING RING, REPLACEMENT. SOME MACK VEHICLES EQUIPPED WITH MP8 ENGINES BUILT SINCE JANUARY 2010 REPORT OIL LEAKING AT THE DRAIN PLUG INSERT IN THE 13L PLASTIC OIL PAN (PART NUMBER 21368390) DUE TO O-RING MATERIAL DEGRADATION. IF OIL PAN IS SHOWING EVIDENCE OF LEAKAGE, REPLACE ALL O-RINGS AND...

FSB 861-006 — STRUCTURE:BODY:BUMPERS

BUMPER, REPLACEMENT. THE CURRENT FRONT BUMPER ON SOME MACK MRU TRUCKS BUILT BETWEEN 10/22/2007 AND 11/14/2014 MAY EXPERIENCE TWISTING AND WARPING WHEN MOUNTED WITH SINGLE SUPPORT STRUTS AT EACH END OF THE BUMPER. TO PREVENT WARPING AND TWISTING OF THE FRONT BUMPER, A MORE ROBUST BUMPER DESIGN WILL REPLACE THE...

FSB-221-009 — ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS

MACK TRUCKS: HOSE, ENGINE OIL FILL TUBE. ENGINES BUILT BEFORE FEBRUARY 11, 2013 MAY EXHIBIT MINOR OIL SEEPAGE FROM THE ENGINE OIL FILLER TUBE HOSE OR DISPLAY STRESS CRACKS IN THE HOSE. *JS UPDATED 7/3/13. *PE

FSB-364-032 — ELECTRICAL SYSTEM:SOFTWARE

MACK TRUCK: TRUCKS WILL BE REPROGRAM WITH THE LATEST SOFTWARE VERSION OF VEHICLE ELECTRONIC CONTROL UNIT AFTER EXPERIENCING LOST OF DST2 AND THE CHASSIS ID. *PE

SP-652-004 — SUSPENSION

MACK TRUCK: TORQUE ROD RELOCATION FOR HN SUSPENSION. CERTAIN MODEL TRUCKS WITH HN SUSPENSION HAVE BEEN FOUND TO MAKE CONTACT WITH THE TORQUE ROD AT THE CARRIER ASSEMBLY BRACKET. *PE UPDATED 9/9/11. *PE

SP-373-014 — FUEL SYSTEM, DIESEL

MACK TRUCKS: CONNECTOR PLUGS FOR THE FUEL HEATER SOLENOID MAY BE MISSING. *RM

SP-258-23 — FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP

MACK TRUCKS: FUEL PUMP REPLACEMENT INFORMATION. *RM

FSB-874-051 — EQUIPMENT:APPLIANCE:AIR CONDITIONER

MACK TRUCK: A/C HOSE CONDENSATION REMEDIATION. THE LOW PRESSURE A/C HOSE USED ON THE OPTIONAL REDDOT ROOF MOUNTED AIR CONDITIONING UNIT MAY DRIP CONDENSATION ONTO THE ELECTRONICS AND OPERATOR CONTROLS MOUNTED ON THE ENGINE TUNNEL. MODELS LEU, MRU. NO MODEL YEARS LISTED. *PE

NHTSA Investigations for the 2011 MACK MRU

There are no NHTSA defect investigations on record for this vehicle.

Other Model Years of the MACK MRU

View all MACK MRU model years →

Other MACK Models

View all MACK models →

Check any vehicle history by VIN - Free vehicle history report