Tesla’s stock continues to pullback, as the souring of public opinion toward CEO Elon Musk fuels worries of lower sales.

Musk, who also runs SpaceX and a number of other companies, has been known to make big often exaggerated promises. For example, he once called the Hyperloop, which was never built, the "fifth mode of transport" and famously promised to take Tesla private in a Twitter post, saying he had secured financing that he didn't have.

Tesla’s driver assistance software, known as full self-driving, or FSD, will see unsupervised tests in Texas, California and other states this year.