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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Navigation, iDrive, Audio, Video, Bluetooth, Phone, Cameras, Electronics > Downgrade NBT EVO ID5 to ID4
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      11-04-2019, 01:51 AM   #1
Kris_s
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Downgrade NBT EVO ID5 to ID4

Hello to all
I've searched a lot, but there is not much about how to come back from ID5 to ID4 which I'm actualy struggling. For now, I managed to erase V850 with Tool32 and stepdown BTLD to 001. As for ID4 BTLD should be 003
When I try to calculate svt_soll results are:
https://ibb.co/yX1FCd5
Don't know if its ok or not.
If anyone have instructions what to do to make it succesfull please share

update1:
yesterday I was trying to flash the unit with FA (donor vin and zeitkriterium build date of unit).
I was searching for propper i-step and something strange was happen.
Sometimes after calculating svt_soll there appears NBT with red bltd 003, cafd, swlf.... and NBT2 was with nothing to target.
And sometimes there were red target state NBT2 with bltd 001 but also ATM showed up - don't know really why. Afterwards because of ATM I couldn't flash the unit because of missing SWEs in PSdZdata - in spite of full version v.4.20.11 which I have currently.

Last edited by Kris_s; 11-06-2019 at 01:12 AM..
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      09-14-2020, 02:11 PM   #2
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You actually can downgrade an ID5 flashed EVO to back to ID4 but you'll need a tool that can disable the region lock and sanity check for VO coding after the BTLD, SWFL and IBAD files are flashed.

We've done this a few times without any issue.
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