Volkswagen Jetta: Over 10 Million
Volkswagen scored big with the Golf but realized they needed a sedan to fill the gap between the Golf and Passat. So, in 1979, the Jetta was born and it was basically just a Golf with a trunk. However, it proved to be successful, selling all over the world with different names, but the same technology. So far, it has sold in over 10 million copies.