"NY" wrote in message
o.uk...
"Andy Burns" wrote in message
...
The Natural Philosopher wrote:

how does the thief read a key that doesnt transmit? Until you press the
wotsit?

Keyless entry constantly transmits, you just keep it in your pocket, no
pressing to enter or start.

Do they constantly transmit? I thought they were dormant until they
received an interrogation signal from the car - or from a thief's cloning
device. I think also most keys transmit a unique code (different every
time the car challenges the key) to turn off the immobiliser - so even if
the key's serrations or the electronic unlock/start code work, there is a
second line of defence that will not admit fuel to the engine. Evidently
whatever technology car thieves use can also cope with the unique rolling
immobiliser code.

That last isnt possible.