A control arm assembly includes a control arm including a knuckle support member having an upper surface, a lower surface, a proximal end portion and a distal end portion. The upper surface includes a recessed portion extending from the distal end portion toward the proximal end portion. The distal end portion includes a collar defining an aperture for receiving a housing of a ball joint. The control arm assembly also includes a protective cap attached to the knuckle support member. The protective cap overlies the recessed portion of the upper surface of the knuckle support member.