Carbon fiber (Launching Soon)
Carbon fiber is a flexible fabric-like material that, when combined with a polymer, can be molded into the shape of a car part that is stronger and lighter than today’s steel and aluminum parts. The higher cost is based on the fiber material itself, as well as longer production times. Metal parts can be stamped in seconds, but it can take several minutes for a carbon fiber part to be molded and cured.
BMW is using carbon fiber in key roof elements, supporting roof pillars, and door frames—essentially anything that’s high off the road. Meanwhile, steel and aluminum are employed for the chassis.