From Automotive News:
Max Page, the young actor behind the wildly popular Volkswagen "Little Vader" character, has undergone successful surgery to correct a heart issue. Page was born with a defect called Tetralogoy of Fallot, which can cause low oxygen levels in the blood. Surgeons replaced Page's pulmonary valve in an operation that took around two hours without any complications or incidents. Tetralogy of Fallot is only treatable with surgery, and while doctors had worked to preserve Page's pulmonary valve, it deteriorated over the course of the actor's young life to the point of needing replacement.
Source -> http://www.autoblog.com/2012/06/17/successful-heart-surgery-for-vws-little-vader-w-video/
Earlier related links -> http://www.dannyfinnegan.com/2011/02/meet-max-page-aka-vader-from-vw-ad.html & http://www.dannyfinnegan.com/2011/02/they-didnt-have-remote-start-in-1988.html