The Toyota Land Cruiser is a series of four-wheel drive vehicles produced by the Japanese automobile manufacturer Toyota. It is Toyota's longest running series of models. As of 2019, the sales of the Land Cruiser totalled more than 10 million units worldwide. Production of the first generation of the Land Cruiser began in 1951 as Toyota's version of a Jeep-like vehicle. The Land Cruiser has been produced in convertible, hardtop, station wagon and cab chassis bodystyles. The Land Cruiser's reliability and longevity has led to huge popularity, especially in Australia where it is the best-selling body-on-frame, four-wheel drive vehicle. Toyota also extensively tests the Land Cruiser in the Australian outback – considered to be one of the toughest operating environments in both temperature and terrain.