Connected cars, much like smartphones, have ushered in the era of disruption in the auto industry. It has made us reimagine the vehicles we want to drive. This change will be sooner than we imagine. Connected cars bring huge possibilities, but they also open a significant number of avenues through which a vehicle can be hacked with the possibility of stealing personal information. Chipset makers, technology providers, vehicle manufacturers (OEM), and Tier-1 companies are continuously trying to strengthen the vehicle architecture without compromising the functionalities. This white paper gives an overview of various connectivity interfaces of connected vehicles, their possible vulnerabilities, and changing vehicle architecture.