This research explores the transformative potential of the Ethereum blockchain in revolutionizing the automotive supply chain through practical implementation. Unlike many theoretical studies, our research addresses the pervasive challenges encountered by traditional methodologies, such as opacity, operational inefficiencies, and the proliferation of counterfeit parts, by introducing “AutoBloc,” a decentralized application (DApp). Engineered to streamline role assignment and management across various entities including Manufacturers, Dealers, Logistics, and Customers, AutoBloc leverages Ethereum's advanced capabilities in traceability and security enhancements to mitigate these challenges effectively. Notably, our approach emphasizes practical implementation, integrating Ethereum smart contracts with cutting-edge tools like Truffle, Ganache UI, and Remix IDE for Solidity testing. Through these concerted efforts, this research endeavors to redefine the automotive supply chain landscape, ushering in an era characterized by enhanced trust and reliability.