Mitsubishi Motors North America (MMNA) is recalling certain model year 2006-2007 Lancer and Lancer Evolution vehicles manufactured June 29, 2005, to June 19, 2007, equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules, and used as original equipment or replacement equipment. In the event of a crash necessitating air bag deployment, these inflators may rupture due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.