If your car's starter motor is faulty, the starter may need to replace it. To do this, you'll need to disconnect the battery, remove the starter from the car (which may involve removing other components to access it), and then replace it with a new one. If you're not comfortable doing this yourself, the car might need to be taken to a professional mechanic or car repair shop. Before replacing the starter, it's also a good idea to check other components, such as the starter relay and starter gear, to ensure that they're not the source of the problem.