FEBI BILSTEIN 43946 Front Brake Disc Set Pair BMW Z4 E85 E86 3.0. FEBI Bilstein: 43946. BMW Z4 Coupe (E86). BMW Z4 (E85). ✅ Genuine FEBI Bilstein product. BMW OE:34 11 6 864 047, 34 10 1 166 071, 34 11 6 855 156, 34 11 6 769 305.