The automotive industry is evolving rapidly, with drivers expecting more intelligent and personalized experiences. To meet these expectations, automakers are turning to generative AI-powered voice assistants that can answer questions, offer insights, and adapt to each user's preferences. However, building such intelligent systems requires a flexible and scalable data infrastructure, which MongoDB Atlas provides. By combining gen AI with powerful data infrastructure, companies like BMW, Honda, and HARMAN are pushing the boundaries of AI-driven car assistants. With MongoDB Atlas as their data layer, these companies can accelerate digital transformation, deliver next-gen in-car experiences, and unlock new levels of innovation. The solution is built on a flexible architecture that combines the power of MongoDB Atlas with Google Cloud's AI capabilities, enabling seamless, scalable, and secure deployment of gen AI apps.