Mix up a tiny spot of epoxy. Put it on the end of the key. Stick two strips of paper to the sides of the key and sticking out an extra 1/8" so the key handle doesn't get glued to the cylinder. Insert the handle until the glue hits the broken piece. Use string or rubber bands to hold it there for a few hours. Pull 'er out. The dealer might be able to use the two pieces to cut a new key.
September, 9, 2012 AT 10:55 AM
A locksmith should be able to help you get it out and make new keys for you.