something i found
take your V5 doc's and a form of ID to your Renault Dealer.
and ask them for the 4 digit immobiliser bypass code
(They will not be happy you know about it, 2 dealers by me refused to acknowledge its existence)
it should cost around £15.Turn on the ignition and the immobiliser light will come on,
press the accelerator down and the light should go off.
While keeping the pedal down press the windscreen washer button on the end of the stalk(trust me on this)
and you should see the immobiliser light come on on the dash.
Press it for the corresponding number on the first digit of the code renault
gave you e.g.if first digit 2 press twice.
Lift the accelerator pedal press it back down and repeat for digit 2 of the code and so on.
I have heard that some models need to press the central locking button instead of the washer button