The current Mitsubishi Colt is a supermini built by Mitsubishi Motors at their NedCar plant in the Netherlands , using the same underpinnings as its sister car , the now discontinued Smart Forfour . In 2003 , a new Colt was released by Mitsubishi in Japan with a design by Olivier Boulay and built on the same platform as the Smart Forfour . A European version made at Mitsubishi 's NedCar facility followed into production a year later ( see below ) .