Embodiments of the invention provide a coolant drainage system including a module housing and a drain pan coupled to the module housing. The module housing at least partially defines a machine cavity and includes an inner wall and at least one end cap at least partially enclosing an electric machine within the machine cavity. The coolant drainage system also includes a plurality of drain holes through the module housing and adjacent to the drain pan. The plurality of drain holes provide fluid pathways from the machine cavity to the drain pan.