ZF Bielefeld remanufactures used vehicle parts (clutches, etc.) for the aftermarket, following Cradle to Cradle (C2C) principles. This process reduces material usage by 50-90% and energy consumption by up to 90% compared to new parts, supporting a circular economy. The company uses human expertise, is developing return software and AI for quality control, and aims to increase its returns of old products to 90% by 2028. All products are C2C certified.