A plastic housing with a sleeve-shaped metal insert has a mounting side for attachment to a mounting side of a metal carrier body by a connector element. The plastic housing has a mounting flange defining an opening and a top edge of the flange. The sleeve-shaped metal insert is arranged in the opening of the mounting flange, and has a top edge extending over the top edge of the mounting flange and an opening therethrough. The plastic housing has projecting plastic material on the mounting side of the mounting flange which provides a spacing between the sleeve-shaped metal insert and the metal carrier body by enclosing in the shape of a ring the lower edge of the opening in the mounting flange. The projecting plastic material insulates the sleeve-shaped metal insert from the metal carrier body and provides a seal against the effects of moisture.