hey there, replaced both rear abs sensors due to the light being on and vagcom pointing to the rear sensors. this didnt help, and found out that the rings that give the abs sensors the signal have perished. are these replaceable? as i cant find these anywhere or do i need to replace the full hub!? if so.. will hubs from a 2006 model 5door 2.0 tdi fit a 2004 3door 2.0 tdi?? thanks for the help!!