Maz - do you mean the fuse box cover under the bonnet attached to the N/S inner wing, is the clip that secures it broken?, the top cover just wiggles into place, but if the clip that secures it is broken then that means replacing the lower half with the wiring harnessess and fuse/relay blocks in it as the clip is part of the lower half(why o why did Renault do that), i have replaced my lower half as the clip was broken when i got the car, they are a bit of a b**ch to do and expect to take the skin of your knuckles doing it.