Automotive networks are simple, real-time networks with very low error rates. In-vehicle infotainment (IVI) systems include GPS-based navigation and wireless hotspots for cellular communication. In the event of a power outage or a major catastrophe, such as an earthquake, existing network mainframes may either shut down completely or become overloaded with traffic. In that regard, it is important for emergency vehicles to spread the word of certain emergencies, such as road closures and traffic accidents, to vehicles within the area. In this paper, we propose a method using the peer-to-peer broadcast model to transmit emergency messages between vehicles using IVI and GPS systems. A distributed peer-to-peer algorithm is presented to deliver a high priority message and avoid acceptance of duplicated ones to enlarge the broadcasting coverage of messages with higher priority. We also discussed the usability, feasibility and future improvement of this proposed model.