Acura 35118-TY2-A00 Emergency Key Blank Insert

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72147-TZ3-A11 is driver key #1 72147-TZ3-A51 is driver key #2 essentially that is for memory pre sets say for your seat position and mirror placement you should have a small number pad with a 1 or 2 and you can set your key to that as memory 1 so when you get in the cvar it senses you have key one for example and go to preset one that you have saved for that key. if you look on the back of the key fob you have it will say one or 2 you will need the number you do not have obvioiusly and the emergency key if you do not have that either (35118-TY2-A00)