Does mirage die in transformers 3?

No, Mirage does not die in Transformers 3: Dark of the Moon. He is severely damaged in the film's climax during the battle in Chicago, but he survives. He is last seen in the film being transported for repairs.

It's important to note that while Mirage is a popular character, he was not originally intended to be in the movie. He was only added after the studio decided to give the Autobots a more varied look and feel.