Abstract: A reversible external sideview mirror has a mirror element and a left/right reversing mechanism for alternatingly mounting the mirror on a left side and on a right side of the vehicle and including two joints, with an arm having a plurality of mirror stabilization grooves provided for a right side use and for a left side use, and formed by two segments a spring located in an angular joint a stepped swivel pin having a smaller diameter portion extending through the spring and a larger diameter portion which is pressed against the spring and an a elastic pin extending through a radial perforation provided in an end of the swivel pin and also in one of the mirror stabilization grooves for a right side use or in respect to one of the mirror stabilization grooves for a left side use, depending on whether the mirror is installed for use on the left side or the right side of the vehicle.