Over 5,000 parts manufacturers are active, including global brands like Bosch, Continental, Denso, Visteon, Delphi, Johnson Controls, Bridgestone (via Brisa), Sumitomo Rubber, Pirelli, and Goodyear operating joint ventures in Türkiye. The sector invests heavily in CAD/CAM design, CNC machining, prototyping and collective R&D, geared toward EVs, autonomous technologies, sustainability, and energy efficiency.