Daimler Trucks North America is recalling 2,725 Western Star brand 4900 and 5700 sleeper cabs from the 2016-2020 model years because an improper adhesive could allow the vent windows to detach from the trucks.
On the affected vehicles, a strut assembly that prevents the vent window from over-rotating and detaching from the hinge may fail due to adhesive failure in the manufacturing process, according to a posting on the National Highway Traffic Safety Administration (NHTSA) website.
If a window separates from the vehicle in motion, the resulting debris could cause a road hazard.
A dealer notified Daimler Trucks in September 2019 of a vent window separation. Following a joint investigation with the supplier to find the root cause, Daimler decided to conduct a recall of vehicles built between Jan. 15, 2015, and Oct. 29, 2019. About 4% of the vehicles are expected to have the problem.
Daimler Trucks North America-authorized service facilities will replace the vent windows.
Dealers and owners will be notified of the recall on Jan. 2, 2020. The NHTSA recall number is 19V-792.
In April this year, Volvo Trucks North America conducted a similar recall on 14,009 VNL and VNX heavy-duty trucks from the 2018-2020 model years. In those trucks, an adhesive bond between the glass and hinge of the sleeper bunk window could detach, causing the window to fall from the vehicle.