Infotainment systems have placed internet connected computers into the dashboards of modern vehicles. Consumers now consider the connectivity and functionality of these computers as one of the most important criteria for purchasing a new car. For other computing platforms, communities of hackers and developers have grown around the concept of providing new features, or fixes to bugs, that the original manufacturers denied their customers. These communities provide the ability for users to modify their device, install additional software, and expand the device from its original functionality. In this talk we present the results of our extensive reverse engineering effort on the Toyota Entune infotainment system.