Modern cars contain up to 20 percent plastic. This makes them lighter and more energy-efficient. Headlights, bumpers, mirrors are the most obvious polymer components on the outside. In the interior, there is hardly any part that is not made of plastic.
Many more plastic components are hidden from sight, such as injection-molded plug-in connections for sensors, control signals, and power transmission. These small, but significant, parts require a good deal of engineering. The connectors are exposed to a lot of stress, such as changing temperatures and vibrations, but must nevertheless be secure and reliable.