Based on a 1992 Citroen ZX the Onyx, styled by students of the Espace Sbarro, was completed in 1993. The requirement from Citroen was to provide a new design to the ZX base by means of a body kit who's cost must not exceed 5% of the price of the new car. The result of this effort was this lemon-yellow three door concept. The Onyx has been shown at various exhibitions but remained a one-off. The car is in very good condition and has covered a mere 4’500 kilometres. The basis of this styling exam had originally been imported by Citroen Suisse but had never been registered for road use.