The automotive industry is transitioning to software-defined vehicles (SDVs) that leverage over-the-air updates for new capabilities. Nexus SDV, a partnership between Google Cloud and Valtech, is a new AI-enabled connected vehicle platform designed to manage millions of devices. It integrates deeply with Android Automotive OS, streamlining data and in-vehicle user experiences. The platform's core showcases how Arm-based compute and Bigtable can reduce total cost of ownership. Nexus AI acts as the intelligent engine, using AI models to transform vehicles into proactive, agentic partners. This platform focuses on reducing operational costs by using efficient hardware and optimized data storage. Its cloud-native architecture ensures robust data flow between vehicles and data centers. Google Cloud's security framework provides defense-in-depth, protecting against threats and ensuring compliance. Nexus SDV offers an open-source framework for manufacturers to build the next generation of automotive intelligence securely and cost-effectively.