A system that secures an upper door of a UTV or other vehicle to the vehicle and enables the ready removal and storage of the upper door from the vehicle employs magnets. A first set of magnets is carried by the upper door. A second set of magnets, which is attracted to the first set of magnets, is carried directly or indirectly by the vehicle, such as by a filler panel secured to the vehicle. Methods of deploying and securing an upper door in place and at least partially removing the upper door are also disclosed.