What are the top 4 reasons for car trouble?

Battery problems. A dead or weak battery is the most common cause of car breakdowns. This can happen for a number of reasons, such as leaving the lights on, not driving the car often enough, or having a faulty battery.
Engine problems. Engine problems can range from minor issues, such as a bad spark plug, to major problems, such as a blown head gasket. Engine problems can be caused by a number of things, such as old age, lack of maintenance, or poor driving habits.
Transmission problems. The transmission is responsible for transferring power from the engine to the wheels.
Transmission problems can range from minor leaks to major failures. Transmission problems can be caused by a number of things, such as old age, lack of maintenance, or driving with a low transmission fluid level.
Tire problems. Tire problems can range from a flat tire to a blowout. Tire problems can be caused by a number of things, such as driving on underinflated tires, hitting a pothole, or running over debris.