MACH I Member
Joined: Aug 2007
Location: greater Chicago area
There is a reason it takes two keys in order for you to program a third key yourself. If it only took one key, then anyone who ever parks your car would only need to keep a supply of blanks with him and use your key the short time he has it to make a copy of your key (and then steal your car at his leisure). Needing two keys in order to program a third spare is in itself part of the anti-theft system.
We all need to either pay the $50 or so for a blank and program a third key ourselves (while we still have the original two keys), or just never ever lose a key. Murphy's law says that those who pay for a third key now will never need it, while those who don't go to the trouble and expense of obtaining and programming a third key will most certainly be the ones who lose one (or both) of their keys in the future.
2013 Boss 302 gotta-have-it green
2008 Shelby GT500 torch red with black stripes + sequentials
2001 Cobra mineral grey with 2003 Mach 1 shaker hood
1996 Cobra color-shifting mystic paint + sequentials