Some 2021 Bronco vehicles built on or before 23-Jun-2021 may exhibit a whistle noise from the driver side mirror while driving. This may be due to an excessive gap between the side mirror and mirror cap assemblies. An improved version of the mirror cap has been released for service. To correct this condition, replace the mirror cap with service base part number 17D743. Refer to the parts catalog for the VIN specific application.
