A bracket for use in installing a sensor in a vehicle includes a main body portion having one or more screw holes formed therein, and slot portions for receiving and holding end portions of a back plate of the sensor. The slot portions are connected to end portions of the main body portion, and one or more screw holes formed in the main body correspond to one or more screw holes formed in the back plate. When the back plate is fitted into the slot portions, the slot portions restrict movement of the back plate therein.