Thanks for your replies madnoel10 & rentech. Madnoel - is there a specific name for the air bag control box? (i.e it is not the
you are talking about)...
Will update as/when I finally get a solution.
(As you say rentech it could cost me a lot more if I end up taking it to Renault dealer as they will go 'by the book' and replace every part their manual recommends