For the Wess–Zumino model, an internally consistent prescription for dimensional regularization of superficial diagrams is proposed; it is completely equivalent to the component approach. At the same time, this prescription leads to a loss of superinvariance in the higher orders of perturbation theory. It is shown that the violation of the supersymmetric propagator Ward identities is possible only from the five-loop level. Diagrams that violate these identities are exhibited.