2024 Mack Lr problems, complaints & recalls
Safety recalls (6)
Electrical System:wiring:fuses And Circuit Breakers 2024-03-27 · campaign 24V232000 · 106 vehicles
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2024-2025 LR natural gas vehicles. The methane detector may be inoperative due to a missing fuse.
Risk: An inoperative methane detector can fail to detect a gas leak, increasing the risk of a fire or injury.
Fix: Dealers will install a fuse, free of charge. Owner notification letters were mailed April 10, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0461.
Vehicle Speed Control 2023-11-22 · campaign 23V792000 · 650 vehicles
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2023-2024 GR, AN, LR, and Terrapro vehicles. The engine may not return to idle within 2 seconds if the accelerator pedal position sensor becomes disconnected. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 124, "Accelerator Control Systems."
Risk: An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.
Fix: Mack will replace the throttle pedal and update the vehicle software, free of charge. Owner letters were mailed February 27, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0455.
Steering 2023-10-24 · campaign 23V713000 · 47 vehicles ⚠ DO NOT DRIVE
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2024 LR vehicles. The fasteners that connect the power steering assist cylinder to steering arm may be loose or missing.
Risk: The power steering assist cylinder may separate from the steering arm, causing a loss of vehicle control and increasing the risk of a crash.
Fix: Owners are advised not to drive their vehicles until the repair has been performed. Dealers will inspect and tighten the steering gear fasteners and install a new cotter pin, free of charge. Owner notification letters are expected to be mailed December 15, 2023. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0451.
Structure 2023-07-27 · campaign 23V513000 · 19 vehicles
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2024 LR garbage trucks. The reinforcing floor welds may be missing from around the passenger seat pedestal, reducing floor strength.
Risk: The pedestal may buckle during a crash, preventing the passenger seat from properly restraining a passenger.
Fix: Dealers will inspect and add welds as necessary, replace the missing floor welds, free of charge. Owner notification letters were mailed September 12, 2023. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0446.
Visibility:windshield Wiper/Washer:linkages 2023-07-03 · campaign 23V465000 · 204 vehicles
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2023-2024 LR garbage trucks. The wiper arm retention nuts may be loose, stripping, and causing the windshield wipers to fail.
Risk: Inoperative windshield wipers can reduce visibility, increasing the risk of a crash.
Fix: Dealers will inspect, tighten the retention nuts, and replace the windshield wiper arms as necessary, free of charge. Owner notification letters were mailed August 22, 2023. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0445.
Electrical System:horn 2023-05-02 · campaign 23V310000 · 5 vehicles
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2024 LR electric garbage trucks, equipped with electric horns. The circuit connecting the horn button to the horn is missing, making the horn inoperative.
Risk: A vehicle with an inoperative horn cannot alert other drivers, increasing the risk of a crash.
Fix: Dealers will add the necessary circuits to connect the horn button to the horn, free of charge. Owner notification letters were mailed June 20, 2023. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC443.
Service bulletins (80)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-06-22 · CBR-2592-1 202606 · Service Bulletin/Repair Instructions
the purpose of this cbr is to provide steps on how to correct a customer complaint of dtc p107b86 accompanied with intermittent loss of throttle.
Power Train 2026-04-09 · CBR 2573-1 202604 · Service Bulletin/Repair Instructions
cbr - mack chassis - through shaft bearing retainer breakage on mack carriers.
Power Train 2026-04-09 · CBR 2362-3 202604 · Service Bulletin/Repair Instructions
cbr - mack carrier nut adhesive change.
Suspension 2026-04-02 · SC S4920 202604 · Service Campaign
sc - trunion nut pinch bolt.
Unknown Or Other 2026-03-19 · CBR 2712-7 032026 · Service Bulletin/Repair Instructions
cbr - no start condition after over the air programing.
Fuel/Propulsion System 2026-02-01 · S4342 022026 · Service Campaign
sc - mack trucks has determined that a select group of trucks were built with an ahi module fuel pressure sensor which does not meet our specifications.
Showing the 6 most recent of 80 bulletins. Search all of them free at nhtsa.gov.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.