In 2003, Volkswagen took the lead in equipping ordinary cars with a DSG dual-clutch transmission. In just a few years, the number of vehicles equipped with DSG has exceeded 1 million, and the assembly ratio of some models exceeds 28% (Passat station wagon). Many Volkswagen cars now have DSG, such as the Magotan, Sagitar, and the new Golf, which all use the TSI+DSG power system. Since DSG is a registered trademark of Volkswagen, only Volkswagen brand dual-clutch transmissions can use the title DSG. So as long as it is DSG, it must be a Volkswagen car. Compared with other manufacturers, Volkswagen's DSG products were not only launched earlier (the first to assemble ordinary cars), but also have a wide range of applications. At present, Volkswagen's two DSG products are widely used in its mainstream models, including Golf, Golf (station wagon, Plus, GTI and R32), Sagitar, Eos, Passat, Passat Station Wagon, Touran and Caddy, as well as the latest launched Passat CC. Among them, DSG is present in almost all series of the main model Golf. In Volkswagen's system, not only the TSI gasoline engine can be well matched with the DSG transmission, but there are also many matches between the TDI diesel engine and the DSG transmission. Currently, engines matched to DSG transmissions range from 1.4-liter to 3.2-liter displacement, including supercharged models and naturally aspirated engines.