Defect: Mack Trucks, Inc. (Mack) is recalling certain 2019-2023 LR battery electric trucks. The power cables that connect to the windscreen heater relay may have a loose connection and cause the relay to fail.
Consequence: A relay that fails in the closed position will continue to power the cabin heater, overheating the relay and increasing the risk of a fire.
Remedy: Dealers will tighten the power cable to relay connection, free of charge. Owner notification letters are expected to be mailed August 4, 2023. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SCC0444.
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2019 and 2021-2023 LRBE battery electric trucks. The cabin heater relay may fail, causing the coolant heater to overheat.
Consequence: A coolant heater that overheats can increase the risk of fire.
Remedy: Dealers will update the software for the Hybrid Powertrain Control Unit and Instrument Cluster, and install replacement relays, free of charge. Owner notification letters were mailed March 16, 2023. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0440.
Do not drive: No. Park outside: No.
Investigations
0 investigations; 0 open.
Manufacturer communications
23 manufacturer communications.
Communications by system
System
Count
ELECTRICAL SYSTEM
13
POWER TRAIN
5
EQUIPMENT
2
SERVICE BRAKES
2
SUSPENSION
2
VEHICLE SPEED CONTROL
2
ENGINE
1
ENGINE AND ENGINE COOLING
1
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.
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.
11021333
Date: 2025-07-17. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM, SERVICE BRAKES.
CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
11018819
Date: 2025-05-15. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
Battery Electric Vehicle (BEV) - DTC P109D8A Following Energy Storage Control Module (ESCM) Software Update
11012156
Date: 2024-12-03. Type: Service Bulletin/Repair Instructions. Systems: SUSPENSION.
Frame lean can be caused by several seemingly isolated possibilities. The two most common are suspension and frame assembly issues.
11008366
Date: 2024-09-13. Type: Service Bulletin/Repair Instructions. Systems: SERVICE BRAKES.
CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded.
11005410
Date: 2024-07-02. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
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.