I would at least report it to Renault. When I was test driving a cup a month or so back I asked them if theyd sorted the airbag prob and would the MD write me a letter to that effect ( I said Id deliver it back via their front window if I got f**ked about like some of the people whove had the bag go off for no reason), he said hed heard of a mod to rectify it so not a problem.
Ive heard of several bags going off (with out a crash) and renault wont cover it, insurance job!!!