Abstract: A pair of upper and lower brackets are supported from the inner forward upstanding marginal edge portion of a side mounted vehicle rear vision mirror and a vertically elongated wind deflector panel assembly is supported from the brackets. The panel assembly includes a main deflector panel spaced between the vehicle side and the forward inner marginal portion of the mirror and also includes forward inner and rear outer upstanding marginal portions. The panel assembly additionally includes a secondary panel stationarily supported relative to the main panel, disposed on the outer side thereof and spaced between the main panel outer rear marginal portion and the mirror forward inner marginal portion. The main panel is rearwardly and outwardly inclined relative to the vehicle and the secondary panel is inclined relative to the main panel to define a forwardly opening obtuse angle therewith.