I thought about it too but I know the 03 has a rolling code transponder chip in it as you cannot use the T5 key on it so for this to work you have to gut a T5 or a 02 key take the transponder chip out and put it into the 03 key as for the remote you have to check the crystal frequency and the code chip and if crystal it's not too hard to swap if you know how to solder surface mount. when I hat my hands on a 03 key will check the frequency with a counter. as it's a neat idea...