The average car is made up of about 1,800 separate parts. This includes some large components, such as the engine, which is inserted as a unit during the car-making process but contains thousands of individual pieces itself.
Each car generally requires between 4,500 and 4,800 welds to fit together the required pieces. A standard car takes about 19 hours to assemble in a factory. However, the assembly systems are huge, with thousands of employees on shift work. Robots and rolling assembly tracks are also part of the process. Numerous cars are put together in a manufacturing plant at one time. A normal production day yields about 1,450 cars.