FIG. 1 is a perspective view of a theft-prevention ignition disabling unit for vehicles showing my new design;

FIG. 2 is a top plan view thereof on a reduced scale;

FIG. 3 is a side elevational view thereof on a reduced scale;

FIG. 4 is a bottom view thereof on a reduced scale;

FIG. 5 is an end elevational view thereof on a reduced scale.