We believe that the most important impact of Stuxnet in the long run is that it provides a blueprint for carrying out similar attacks in different embedded computing environments. To demonstrate this, we started experimenting with attacking cars in the same style as Stuxnet attacked uranium centrifuges. Our experiments show that it is relatively easy to perform dangerous modifications to the settings of different car electronic control units. by sSimply infecting the mechanic's PC or laptop that runs the diagnostic software used to manage those ECUs in the car, and replacing the DLL responsible for communications between the diagnostic software and the CAN bus with a malicious DLL, that we can implements man-in-the-middle type attacks (e.g., replay or modification of commands). As a proof-of-concept, we managed to forge a message that switches off the airbag of an Audi TT without the mechanic noticing the misdeed.