There are new documents available that pertain to the changes BMW implemented in the X3 between 2019 and 2020 model years (new head unit, live cockpit, iDrive 7, etc.). Check out
https://g20.bimmerpost.com/forums/sh....php?t=1585744. The linked webpage does not include "ST1853 B58TU Engine." But if you google it, you can find it.