Some 2021-2022 Bronco vehicles may exhibit a window rattle when driving over bumps with the windows placed in the partially down position. This may be due to incorrect window glass adjustment from the factory. To correct this condition, perform the Front/Rear Door Window Glass Adjustment procedure located in the Workshop Manual, Section 501-11 > Front doors > Steps 18-26, Rear Doors > Steps 21-25. It is not necessary to remove the door panel to perform this adjustment. During adjustment, set the window regulator nuts to their most outboard position (this will move the top of the window inboard), then reevaluate the noise. Be sure to place the window in the fully down position during adjustment.
