The Key Integrated Remote has a couple of part numbers some relate to different frequency ranges in different markets, which you have checked, and I think they revised the part number as Volvo love to do that every now and then.
It's made of 3 parts, the Key blade is a simple metal part and can be replaced by knocking out a tiny roll pin. The key blade is fairly cheap at up to about £20 and I think it can also be supplied by car key cutters these days. From Volvo its up to about £20.
Part 2 is a tiny glass encased RFID chip which lives in the remote and ties into the cars immobiliser system.
Part 3 is the remote section allows you to do all the button pushing etc...
Any new key set comes with a special code that allows the car to have the keys info added to it, and as said before it requires connection to the main dealer system. When a key is programmed the main Volvo computer is updated in Sweden with the details of the key and car combination.
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