2012 Toyota Prius Owners Manual - Page 781

5 -2 . St e ps t o t a k e in a n e m e rge nc y I f you lose your ke ys New genuine keys can be made by your Toyota dealer. For vehicles without a smart key system, bring a master key and the key number stamped on the key number plate. For vehicles with a smart key system, bring the other key and the key number stamped on the key number plate. 472