@ Tim_s
I Have to admit i was thinking more 997 for the OP than the entire range so i wasn't quite correct ..
996 .. A Second hand fob cant be coded onto another car .. once first coded even if the incorrect number is inputted so that it doesn't work it is useless for anything else.
996 Pil .. yes you can but i don't really understand why you would want just this .. if lost keys with a locked car ( fob lock ) you will need to do a window .. the car will be stuck in alarm mode until a recognised fob is used to unlock .
With a key in the barrel to lock then it will lock but not secure lock meaning the operation of the inner door handle will open the door ... breaking in is easier basically .
You will also find you have 10 seconds to put the key in the ignition or the alarm will trigger and on some cars it will trigger as soon as you open the door . Passengers door will not unlock .
Anyways .. yes you can use a second hand pil but it will be a Valet key .
997 Pil .. it wont work.
997 Fob .. if you can't code the Pil then it wont work .
991 , Cayenne ( 2011 onwards ), Macan , Panamera , 981 ... it's a one piece key which HAS to be purchased from Porsche .. it then HAS to be coded by an OPC or an Indy that has access to the Porsche network .. this is called PXN for Indys and PPN for OPC and it's a process of connecting a tester to the car and the tester talks to Porsche .. this then codes it onto the car .
Back to the 997 .. i tried to code on 2 new keys a few months back .. they failed and nothing i could try would get them to code on .. into the office to be told they had been tried on another 997 but failed due to a coding issue ..
They are now paperweights .
I like the idea of fitting a new blank pil because if you can code the pil ( Transponder ) you can code the fob as this isn't done with a tester .
whether it works or not i can't say but i like the idea .
Btw .. if you can find a way to code a second hand key on then i would love to know as we have £400 of junk ones sitting around lol .
Ps .. check email .. i sent you something that may or may not be of use X 51 install on a 997.
Edit .. the above is for using a Piwis and not any other type of laptop .