This Primary Driven Gear Comp. is the most expensive of the items that make up this Clutch assembly.
Parts such as the Clutch: Oil Seal (4g0), Brg,cyl-cal Roller 6g Tm, Nut, Plate, Friction (nas) are included in the Xg250 2005 4d62 Denmark 1d4d6-300e1 Clutch parts fiche.
In this schematic the "Plate, Friction (nas)" is used most often.