The present invention is a breakaway mounting bracket assembly for a wiper system that displaces components of the wiper system below the impact line of a vehicle in the event of, for example, a vehicle-pedestrian impact. The assembly includes a mounting bracket and a grommet removably attached to the mounting bracket. The assembly also includes a ferrule disposed within the grommet that includes a column having an internal passage and a platform connected to the column by a plurality of bridges disposed therebetween. The assembly also includes an attachment member to connect the mounting bracket to the vehicle where the attachment member includes a body engaged to the internal passage. The mounting bracket is adapted to break away from attachment with the grommet in the event of a predetermined load acting on a pivot shaft assembly and to displace the pivot shaft assembly and a portion of the wiper arm below the vehicle's impact line in the event of a pedestrian impact.