Everything got smarter in the past 10 years: phones, TVs, Internet, etc. with one exception: our cars. The basic requirement for being smart is connectivity which is missing from current vehicles on the road. These vehicles are here to stay for at least 15 more years, so an intermediary solution is needed until cars are in fact smart. Making such a piggy-back technology requires many different skills: mechanical, electrical, traffic, telecom and software engineering to name the least. In this talk we will review the architecture of connected vehicles and how big data can help record, transfer and process such huge data. We will also cover technical, ethical and legal challenges of gathering and sharing such data. Applications of connected car technology in auto aftersales, car insurance, traffic prediction and emission modelling will be briefly reviewed at the end.