What is the most popular car in the world [2015]? Answer Wiki. , Full time Geek,Part time Nerd, bookworm, Trekkie , auto crazy..... Hi, The Toyota Corolla is the worlds best selling car with more than 40 million units sold worldwide since 1966, and it still continues to occupy the throne, with more than a million units sold in 2013. Views Â· View Upvotes.