[mj_mj_mj]

Thats what I thought as well, but reading other posts this problem seem to appear due to ISTA+ expecting a new TCM when initializing - it even states when trying to initialize that you need new tcm, not used. So I am pretty certain that the TCM´s that are used get some form of info written when they are initialized the first time. If that block already is occupied ista wont initalize. On newer cars I never have come across this issue. Easy peasy with esys just inject cafd and then initialize.

I ordered two new units from BMW at 400$ a piece. Exactly same numbers on TMS. With these ones the initialization went fine directly. So car is fixed.

No problems at all. Can we agree that there is something that needs to be done with used TMS on cars with FRM as upposed to those which have the TMS in the ECU tree in Esys?

Found this thread that seems to be onto something but missing arguments to get it running. The car is fixed now but still want to find out what needs to be done https://www.bimmerfest.com/threads/used-...ci.962391/