2016 Mack Cxu problems, complaints & recalls
Most-reported problem areas: Power Train (1)
Safety recalls (1)
Parking Brake:driveline:hydraulic:actuator 2015-01-22 · campaign 15V025000 · 349 vehicles
Defect: Mack Trucks, Inc. (Mack) is recalling certain model year 2015 and 2016 CXU and LEU trucks manufactured May 20, 2014, to March 24, 2015, equipped with certain Haldex Life Seal Type 30/30 Long Stroke Air Brake Actuators manufactured from January 9, 2014, through February 3, 2015. The affected actuators may have an incomplete attachment of the internal rubber diaphragm to the actuation mechanism of the parking brake section of the Life Seal actuator.
Risk: If the diaphragm is not completely attached, there may be internal leakage from the service section past the diaphragm, potentially trapping air pressure in the parking brake section. This air pressure in turn, if not vented, may prevent full release of the actuator unit, and may induce brake drag and may result in overheated wheelend service brakes, increasing the risk of a fire.
Fix: Mack will notify owners, and dealers will inspect the brake actuator and replace, as necessary, free of charge. The recall began March 20, 2015. Owners may contact Mack customer service at 1-610-709-2131. Mack's number for this recall is SC0387.
Service bulletins (305)
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.
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 2026-03-02 · CBR 2246-5 032026 · Service Bulletin/Repair Instructions
cbr - z spring bracket wear.
Vehicle Speed Control 2026-01-08 · CBR 820-9 202601 · Service Bulletin/Repair Instructions
cbr - mack chassis - engine brake only works with the brake pedal, no function during cruise. us07 and newer emissions, model year 2008 and newer.
Engine 2025-11-22 · CBR 2171-11 202511 · Service Bulletin/Repair Instructions
cbr - mack temperature sensor troubleshooting guide
Electrical System 2025-07-28 · CBR 2488 072025 · Service Bulletin/Repair Instructions
cbr - a significant gps reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit gps location data.
Showing the 6 most recent of 305 bulletins. Search all of them free at nhtsa.gov.
What owners report
2025-11-05 · Power Train“second occurrence of below happening, first time being 11/28/25, and most recently 11/05/25. clutch engaged uncommanded while stopped with service brakes engaged. truck kept trying to power through the service brakes until it was forcefully stalled out with service brakes. truck is start-able immediately afterwards, but not drivable with engine st…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.