Hello. I have a 2008 X5 e70 3,0sd. It has the 20" wheel arches and aerodynamic package. After intensive googling I have found that there are two possible flaps for the rear.

82160420836 is the part number for mud flaps with 20" wheels (and aero kit).

82160430714 is the part number for mud flaps with 21" wheels (and aero kit).

The lather is discontiued.

Does anyone know what the actual difference is?