A hybrid coolant pump assembly comprising: a housing including an internal cavity (40, 41); a bearing shaft rotatably supported within said internal cavity (40, 41) of said housing; a first clutch disposed on said bearing shaft, said first clutch having an engaged state wherein said first clutch is adapted to drivingly interconnect an input member and said bearing shaft and a disengaged state wherein said bearing shaft is free to rotate relative to said input member; an impeller apparatus positioned about said bearing shaft and configured to pump a fluid; a rotor disposed within said internal cavity (40, 41) of said housing and surrounding said bearing shaft; and a stator disposed within said internal cavity (40, 41) of said housing and surrounding said rotor, said rotor configured to rotate relative to said stator and said bearing shaft when electricity is applied to said stator, said impeller apparatus being rotatably driven by said bearing shaft when said first clutch is in said engaged state, said impeller apparatus being rotatably driven by said rotor when said stator is electrically energized, further including an electronic control unit coupled to the housing, the electronic control unit configured to control operation of the hybrid coolant pump assembly in one of an idle mode, an electric drive mode, and a mechanical drive mode, wherein the controller operates the first clutch in the disengaged state and does not supply electricity to the stator when operating in the idle mode such that the impeller apparatus is not driven, the electronic control unit operating the hybrid coolant pump in the electric drive mode when the first clutch is in the disengaged state and the stator is electrically energized such that the rotor drives the impeller apparatus, the electronic control unit operating the hybrid coolant pump assembly in the mechanical drive mode by operating the first clutch in the engaged state and not electrically energizing the stator such that the impeller apparatus is driven by the bearing shaft, wherein the electronic control unit includes a printed circuit board extending annularly within the housing, the hybrid coolant pump assembly further including a cover and a clutch actuation mechanism, each extending about the housing, the cover sealingly engaging the housing and the clutch activation mechanism to define a sealed cavity in which the printed circuit board is positioned, wherein the clutch activation mechanism includes a coil, the printed circuit board being axially positioned between the coil and the stator. a housing including an internal cavity (40, 41); a bearing shaft rotatably supported within said internal cavity (40, 41) of said housing; a first clutch disposed on said bearing shaft, said first clutch having an engaged state wherein said first clutch is adapted to drivingly interconnect an input member and said bearing shaft and a disengaged state wherein said bearing shaft is free to rotate relative to said input member; an impeller apparatus positioned about said bearing shaft and configured to pump a fluid; a rotor disposed within said internal cavity (40, 41) of said housing and surrounding said bearing shaft; and a stator disposed within said internal cavity (40, 41) of said housing and surrounding said rotor, said rotor configured to rotate relative to said stator and said bearing shaft when electricity is applied to said stator, said impeller apparatus being rotatably driven by said bearing shaft when said first clutch is in said engaged state, said impeller apparatus being rotatably driven by said rotor when said stator is electrically energized, further including an electronic control unit coupled to the housing, the electronic control unit configured to control operation of the hybrid coolant pump assembly in one of an idle mode, an electric drive mode, and a mechanical drive mode, wherein the controller operates the first clutch in the disengaged state and does not supply electricity to the stator when operating in the idle mode such that the impeller apparatus is not driven, the electronic control unit operating the hybrid coolant pump in the electric drive mode when the first clutch is in the disengaged state and the stator is electrically energized such that the rotor drives the impeller apparatus, the electronic control unit operating the hybrid coolant pump assembly in the mechanical drive mode by operating the first clutch in the engaged state and not electrically energizing the stator such that the impeller apparatus is driven by the bearing shaft, wherein the electronic control unit includes a printed circuit board extending annularly within the housing, the hybrid coolant pump assembly further including a cover and a clutch actuation mechanism, each extending about the housing, the cover sealingly engaging the housing and the clutch activation mechanism to define a sealed cavity in which the printed circuit board is positioned, wherein the clutch activation mechanism includes a coil, the printed circuit board being axially positioned between the coil and the stator.