It must be writrten somewhere. But if it isn't I still don't understand the merit here. LEXUS is obligated to fulfill its 48 month warranty. I see no other obligation for an extended one. Furthermore, doesn't one still have other Options? There are many "Good" Warranty companies that will extend the warranty as long as the original 48K mi warranty doesn't lapse. Not trying to be difficult, just trying to understand the case's merit.