The Citroën Traction Avant was a range of mostly 4-door saloons and executive cars, with four or six-cylinder engines, produced by the French manufacturer Citroën from 1934 to 1957. Approximately 760,000 units were produced. The Traction Avant pioneered mass-production of three revolutionary innovations widely adopted since, and still used today: front-wheel drive, four-wheel independent suspension, and the use of a crash resistant, unitary, monocoque body.