This paper addresses the essential role of suppliers in the automotive industry, analyzing their impact on the quality of final products and how effective collaborations can improve production processes. The evolution of supplier relationships has gone through significant stages, from vertical integration in the early 20th century to modern outsourcing models and strategic partnerships, exemplified by systems like the Toyota Production System (TPS). In this context, supplier selection and evaluation have become critical, with advanced technologies such as Artificial Intelligence (AI), the Internet of Things (IoT), and Blockchain being utilized for monitoring the quality of raw materials and finished products, offering innovative solutions for continuous process improvement. Close collaboration with suppliers not only helps maintain a stable and sustainable supply chain but also contributes to enhancing performance and sustainability across the entire automotive industry. These optimization strategies are fundamental for achieving high standards of quality and operational efficiency, essential in a highly globalized and competitive market.