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Originally Posted by rightnow
All modern cars have this. But the transponders needs to be very close to each other. Ive tried this on a FIAT Ducato. Ive put just the key in (without the black key-thingy, the key was broken). And then when putting the black key 'holder' close to the key slot the cars code unit unlocks.
Its not RFID  |
Actually it is RFID... Anything that uses radio signals to send a indentification string to a receiver is considered RFID. In this case the RFID tag in the key is active (since it has a battery). Look on the back of the key and there is a frequency and FCC number for it (at least there is of mine which I have CA, but the older key from my E46 also had this information).
Also many tags work only at the distance of inches and some even require physical contact with the reader...