A device for avoiding the accidental separation of ball and socket in a ball joint assembly and preventing steering and mechanical loss of control on motor vehicles. The device includes a ball joint assembly having a screw-in type socket; provided with a first a second openings and a polymer bearing fitted inside the socket; a ball disposed in the socket such that the polymer bearing absorbs impact exerted on the ball, the ball having a first and second studs coupled thereto, the first stud protruding from the first opening, and the second stud protruding from the second opening the first and second studs includes a safety hole and cotter pin. The device further includes a bell-shaped retainer coupled to the second stud and having a wide portion larger than the second opening precluding thereby displacement of the ball out of the socket.