The integration of Internet of Things (IoT) technologies into modern vehicles has revolutionized transportation by enabling enhanced connectivity, automation, and data-driven functionalities. However, this convergence has also introduced significant security and privacy challenges. This paper explores the emerging security paradigm required to protect vehicle data within the IoT ecosystem. We analyze the vulnerabilities inherent in connected vehicles, evaluate existing protection mechanisms, and propose a multi-layered framework emphasizing encryption, authentication, and privacy-preserving techniques. The goal is to ensure secure data transmission, safeguard user privacy, and maintain the integrity and availability of vehicular networks. This study contributes to the understanding of IoT-vehicle security challenges and offers practical solutions to secure the future of smart mobility.