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Originally Posted by Stl-986
2. Uh...No they dont and in fact will tell you they dont have the codes for fob, only the code for the physical key shank. Also the DME from the donor car, will stay in the DME and not take on the vin of the car it's going into. I know this cause I took a care with a donor DME, immobilizer & single key in and had them add another key fob...they had no issues doing it.
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True that Porsche does not keep the programming codes for the fob, because that is specific to the fob. You have to enter the programming code for the car to get it into the mode to accept the code for the fob - if that makes sense... The programming codes that allow you to actually enter that code is tied to the VIN. In reality, the actual value in the immobilizer for the fob is like four bytes, not the 16 or whatever it is on the tag. Theoretically, you code get that code from the immobilizer and transfer it into another directly. That is exactly what the factory tool does when you swap immobilizers, assuming that it will still communicate with the diagnostics. BTW, it would also be possible to "re-virginize" a used immobilizer to the same state it was when it was new. I don't know that anyone does this, but it is possible.
It is great that the new tools just pull VIN out of the parts you put in. I guess they probably didn't even know that that VIN didn't match yours, as they probably didn't even enter it. They just connected up and it worked. The diagnostic tools automatically pulled it from Porsche's system. This is one big advantage of the new Porsche testers over the old PST-2s, etc. I still think it is a big waste to swap in the DME, immo/BCM and key fobs when all you need is the immo/BCM.
I do stand by my statement that your Boxster now has the electronic "identity" of the car those modules came from. Whether that is an issue or just semantics is something that might take more study. I guess for you right now, it doesn't matter, as yours got handled without issues.