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.
Do not drive: No. Park outside: No.
Investigations
0 investigations; 0 open.
Manufacturer communications
28 manufacturer communications.
Communications by system
System
Count
ENGINE
10
ELECTRICAL SYSTEM
9
POWER TRAIN
4
FUEL/PROPULSION SYSTEM
3
SERVICE BRAKES
2
STRUCTURE
2
UNKNOWN OR OTHER
2
VEHICLE SPEED CONTROL
2
11033126
Date: 2026-05-26. Type: Service Bulletin/Repair Instructions. Systems: STRUCTURE.
Mack TerraPro Door Adjustment Procedure
11032086
Date: 2026-04-09. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.
CBR - Mack Carrier Nut Adhesive Change.
11032092
Date: 2026-04-09. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
11029445
Date: 2026-02-04. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
CBR - The purpose of this solution is to give information on Engine Control Module (EMS) Software content.
CBR - Mack Chassis - Engine Brake Only Works With The Brake Pedal, No Function During Cruise. US07 And Newer Emissions, Model Year 2008 And Newer.
11028032
Date: 2026-01-07. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4) and PR(4)).
11027007
Date: 2025-12-04. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
11026021
Date: 2025-11-12. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
CBR - 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In Between The Coolant Pump Housing And Oil Cooler Housing.
11022293
Date: 2025-08-01. Type: Service Campaign. Systems: STEERING.
FI - Drag Link and Pitman Arm Replacement.
11021332
Date: 2025-07-28. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit GPS location data.
Notes on this record
Complaints from the API and bulk file are merged and deduplicated by ODI number; the API alone misses records.
System and subsystem counts are numbers of distinct complaints, recalls or communications that name them. One record can name several systems, so shares across systems can add to more than 100 percent; a single share never exceeds 100 percent.
Recalls are counted once per campaign, investigations once per action and manufacturer communications once per NHTSA id, even when NHTSA lists several model names for the same record.
A sales denominator is a calendar-year proxy, not the population of vehicles still in use. Rates are copied from verified pipeline output.
NHTSA's complaints API and bulk file list no complaint for this make, model and model year in this data build.