BlueMotion is a tradename for certain car models from the Volkswagen Group with an emphasis on higher fuel efficiency. Volkswagen introduced the name in 2006 on the Mk4 Polo BlueMotion, and in 2007 a version based on the current Passat was released. BlueMotion versions of the Golf Mk5 and Touran, as well as the then 13-year-old Sharan, were released in 2008. It was also made in 2009 for other models including Jetta, Caddy and Touareg, and others afterwards. The name refers to Volkswagen Group's corporate colour, blue, with the word 'motion' added to denote mobility, and echoes DaimlerChrysler's BlueTec engines which are equipped with advanced NOx reducing technology for diesel-powered vehicle emissions control.