The hack was part of a competition at the annual Syscan conference in Beijing, where a prize of $US10,000 was offered to anyone who could pop the smartcar's doors and engine.
An entrant named team 'yo' exploited an unspecified flaw in the flow design of the car gaining access to the Model S allowing them to alter the car functions while it was in motion.
social media post it would publish more details of the hack in due course.
Tesla said in a statement it supported "the idea of providing an environment in which responsible security researchers can help identify potential vulnerabilities" and hoped "security researchers will act responsibly and in good faith".
Billionaire Tesla head Elon Musk announced last month its patents would be 'open source' to promote the adoption of electric cars.