Cars delivered in September from Shanghai don’t have it. Texas & Berlin cars do have it.Still loving my new Y - but looks like some of the newer builds have carpeted C pillars to remove the seatbelt buckle rattle when the rear seats are not reclined. Wondering if any of the UK deliveries have this? In the meantime some black felt tape helps....
In any case my rear seatbelts don’t rattle, as they rest against the seat. If they cause issues you can tuck them in or apply (any colour) felt tape.