The auto-mobile industry has grown to become an integral part of our day -to -day life. The introduction of wireless vehicles definitely have to pass through the analysis of potential security threats and vulnerabilities, and robust security architecture should be designed that are able to cope with these threats and vulnerabilities. In this work, we have identified various categories of research in 'Cyber Security of a wireless vehicle' and mainly focused on 'In -Vehicle Network' to identify various potential security threats and vulnerabilities as well as the suitable security solutions. In addition to providing a survey of related academic efforts, we have also outlined several key issues and open research questions.