The starter is an electrical motor which starts the car's engine. It uses the electrical power stored in the battery to start the engine upon turning the key or pressing the "start" button. In addition to the standard components that comprise an electrical motor, the starter includes a planetary gear, a coil and a bendix. If the starter breaks down or malfunctions, you will have problems starting the engine or be unable to do it at all. The starter can be reconditioned, which is a much cheaper solution than buying a new one, especially if your car is old.