Method for producing a plastics component for a power train of a motor vehicle, comprising: producing a base body of the plastics component and at least one fastening portion of the base body in a single method step by means of a moulding tool, wherein the plastics component is a one-piece injection moulded component, wherein the base body and the at least one fastening portion are produced by an injection moulding method, wherein the base body comprises a wall, by means of which an inside and an outside of the plastics component are separated or separable from one another, wherein the fastening portion comprises at least one receiving opening into which a fastening element is introducible in a direction of introduction, for the purpose of fixing it to the fastening portion, wherein the fastening portion comprises at least one undercut portion which adjoins the receiving opening in the direction of introduction and to which the fastening element is fixable with positive engagement for the purpose of fixing it in opposition to the direction of introduction, wherein the fastening portion is arranged entirely on a side of the wall that faces the outside and extends away from the wall, wherein the fastening portion comprises a hollow cylindrical receptacle which comprises a wall that is in the shape of a cylindrical outer face and surrounds a cavity, wherein the receptacle further comprises two slot-shaped recesses that extend in parallel to an axis of symmetry of the receptacle and divide the wall into two mutually opposed wall portions, wherein because of the slot-shaped recesses, the wall portions of the receptacle are movable, in particular elastically deformable, at least in certain regions in relation to one another and/or in relation to a base portion of the receptacle. producing a base body of the plastics component and at least one fastening portion of the base body in a single method step by means of a moulding tool, wherein the plastics component is a one-piece injection moulded component, wherein the base body and the at least one fastening portion are produced by an injection moulding method, wherein the base body comprises a wall, by means of which an inside and an outside of the plastics component are separated or separable from one another, wherein the fastening portion comprises at least one receiving opening into which a fastening element is introducible in a direction of introduction, for the purpose of fixing it to the fastening portion, wherein the fastening portion comprises at least one undercut portion which adjoins the receiving opening in the direction of introduction and to which the fastening element is fixable with positive engagement for the purpose of fixing it in opposition to the direction of introduction, wherein the fastening portion is arranged entirely on a side of the wall that faces the outside and extends away from the wall, wherein the fastening portion comprises a hollow cylindrical receptacle which comprises a wall that is in the shape of a cylindrical outer face and surrounds a cavity, wherein the receptacle further comprises two slot-shaped recesses that extend in parallel to an axis of symmetry of the receptacle and divide the wall into two mutually opposed wall portions, wherein because of the slot-shaped recesses, the wall portions of the receptacle are movable, in particular elastically deformable, at least in certain regions in relation to one another and/or in relation to a base portion of the receptacle.