1995 - 2002 = Fiat Transponder Key (GT15R) - Fixed Code (pointed blade)
2003 + = Fiat Transponder Key (SIP22) - ID46 (key blade end is flat)


Don't blame me if the info is wrong. Stole it come here


http://www.car-keys-online.com/product/237/fiat-transponder-key-gt15r-fixed-code.html
http://www.car-keys-online.com/product/234/fiat-transponder-key-sip22-id46.html