Structure and method for mounting flag-type side mirror

1. A method of mounting a flag-type side mirror to a door of a vehicle, where a mirror neck of the flag-type side mirror is fastened to the door formed by a plurality of panels bonded to each other, the method comprising:

passing a wiring mounted to the flag-type side mirror through through-holes formed in an outer belt rail, an inner panel of the door, and a quadrant reinforce provided between the inner panel of the door and the outer belt rail;

placing the flag-type side mirror at a position to be installed;

arranging the mirror neck of the flag-type side mirror to abut on a convex portion of the quadrant reinforce through an outer panel of the door, wherein the convex portion bulges outward towards the outer panel;

circumferentially bonding the convex portion of the quadrant reinforce to the inner panel to form a closed cross-section;

passing a fastening member through the outer belt rail and the quadrant reinforce; and

fastening the fastening member to an end of the mirror neck by operating a tool in a direction from inside to outside of the vehicle.

2. The method of claim 1 , further comprising, after fastening the fastening member is performed, fixing the wiring by mounting a grommet provided in the wiring to one side of the door.