2012 Mack MRU: recalls and complaints

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• 25V03000023 Jan 2025Service Brakes, Air / Antilock
• 15V27500011 May 2015Engine and Engine Cooling / Engine
• 14V20800018 Apr 2014Exterior Lighting / Turn Signal / Flasher Unit
• 14V13700024 Mar 2014Engine and Engine Cooling / Engine
• 12V0960008 Mar 2012Electrical System / Alternator/Generator/Regulator
• 11V37400020 Jul 2011Steering / Gear Box / Shaft Sector
• 11V29500020 May 2011Power Train / Driveline
• 11V2720003 May 2011Service Brakes, Air / Slack Adjusters / Automatic
• 11V2120001 Apr 2011Electrical System

1. 25V030000Received 23 Jan 2025. 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: 30 Apr 2025.

2. 15V275000Received 11 May 2015. 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: 12 Jun 2015.

3. 14V208000Received 18 Apr 2014. 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: 25 Jul 2014.

4. 14V137000Received 24 Mar 2014. 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. 12V096000Received 8 Mar 2012. 318 units.

   Electrical System / Alternator/Generator/Regulator

   Defect, in the NHTSA record

   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 NHTSA record

   In the event of an electrical short, a vehicle fire may result.

   Remedy, in the NHTSA record

   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.

   Report filed by MACK TRUCKS, INC. Manufacturer campaign number SC0360. Owner notification date in the NHTSA record: 19 Apr 2012.

6. 11V374000Received 20 Jul 2011. 2,294 units.

   Steering / Gear Box / Shaft Sector

   Defect, in the NHTSA record

   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, in the NHTSA record

   A complete loss of steering may occur increasing the risk of a vehicle crash.

   Remedy, in the NHTSA record

   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.

   Report filed by MACK TRUCKS, INC. Manufacturer campaign number SC0356. Owner notification date in the NHTSA record: 19 Sep 2011.

7. 11V295000Received 20 May 2011. 584 units.

   Power Train / Driveline

   Defect, in the NHTSA record

   Mack trucks is recalling certain model year 2012, chu, cxu, gu, mru, leu, and td trucks equipped with a meritor driveline. The tubing used to assemble the affected drivelines has a nonconforming seam weld with insufficient bonding of the material.

   Consequence, in the NHTSA record

   This can result in seam weld fracture when torque is applied. Once the tube seam weld is fractured, the driveline may become inoperable which may result in a disabled vehicle or debris from the driveline may fall on the roadway, both of which can increase the risk of a crash.

   Remedy, in the NHTSA record

   Dealers will replace the drivelines free of charge. The safety recall began on july 25, 2011. Owners may contact mack trucks at 1-800-528-6586.

   Report filed by MACK TRUCKS, INC. Manufacturer campaign number SC0353. Owner notification date in the NHTSA record: 25 Jul 2011.

8. 11V272000Received 3 May 2011. 1,524 units.

   Service Brakes, Air / Slack Adjusters / Automatic

   Defect, in the NHTSA record

   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 break at the handle under normal operating loads.

   Consequence, in the NHTSA record

   Slack adjusters with this flow notch could crack under normal braking conditions causing loss of braking which could result in a vehicle crash.

   Remedy, in the NHTSA record

   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.

   Report filed by MACK TRUCKS, INC. Manufacturer campaign number SC0352. Owner notification date in the NHTSA record: 12 Aug 2011.

9. 11V212000Received 1 Apr 2011. 3,763 units.

   Electrical System

   Defect, in the NHTSA record

   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 NHTSA record

   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, in the NHTSA record

   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. The safety recall began on june 30, 2011. Owners may contact mack trucks at 1-800-866-1177.

   Report filed by MACK TRUCKS, INC. Manufacturer campaign number SC0349/SC0350. Owner notification date in the NHTSA record: 30 Jun 2011.

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.

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

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.

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.

• Mack MRU: all model years
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• NHTSA VIN lookupNHTSA shows the unrepaired recalls of one vehicle from its VIN or its license plate.
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• NHTSA page of the 2012 Mack MRUThe recalls, the complaints and the investigations that NHTSA shows for this model year.

How many units are in the recall campaigns for the 2012 Mack MRU?

56,730 units in 9 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. 9 of them name the 2012 model year.

Is an NHTSA investigation of the 2012 Mack MRU open?

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