The Stellantis Poissy plant is a French car plant belonging to Stellantis located in Poissy, Yvelines. It is dedicated to the manufacturer's Platform 1 cars, which are cars in the subcompact class, with an annual output of approximately 200,000 cars. In 2010 the plant produced the Peugeot 207, the Peugeot 207 SW and the Citroën DS3. Together with the PSA Research Centres at Carrières-sous-Poissy and at Vélizy, it is one of three major establishments that PSA runs in the department. In October 2010 the plant had 6,535 registered employees.