The Mrs has a 2004 Clio and the airbag light has been on for 2 years. Had to get a *special* Mot last year but as its time for this years MOT I thought id try and fix it.
I first tried the pretention wire mod by cleaning the connectors and then cutting the wires and soldering together but to no avail.
I found a second hand squib/indicators unit from a breakers (£30) which was all in one piece. Watched this youtube video https://www.youtube.com/watch?v=tFT0WN3OW60
which shows a replacement in a Megane (but same issue). Took me about an hour in total once I had the right tools. Disconnected Battery> waited 30min > pop out airbag>take off wheel> remove squib/indicator unit> replace and put back together and bobs your uncle turned back on and no more light!
Im an Accountant by trade so anyone slightly handy should be able to do this and save themselves a few quid. Good Luck