The invention relates to a motor-pump arrangement, having a cup-shaped motor housing for receiving an electric motor, and a pump housing that can be mounted on the motor housing. The pump housing can be mounted on the face end (R) of the motor housing opposite the cup bottom, and that a cap is provided, which can be pressed into the motor housing on the open face end and seals off this housing, the cap has a central bore for a drive shaft and at least one further opening, near the edge, for a through-plated hole.