Abstract: An automatic start/stop apparatus for an automobile including a timer (22) adapted to activate or deactivate a circuit designed to turn on the accessory circuit (42), the ON circuit (44) and the start circuit (50) of an automobile. An oil pressure switch (48) is adapted to stop the starter motor once the engine is running. If the engine failed to start, a solid state timer (46) is adapted to allow cranking of the starter motor only for a preselected amount of time. A hood switch (24) is included to prevent the device from operating when the hood is opened for maintenance. A park switch (26) is also included to stop the device from operating, to prevent unauthorized person to drive away the vehicle.