Good morning

I have a BMW G20 320i 2019 B48B20B Chassis FH05985. The ECU is faulty - The Bosch number is 0261 S10 04E (BMW number 9 894 830)

I have contact AutoHex who said writing ISN to the ECU is not possible. Is anyone within the forums able to do this for me? Or could someone put me in the right direction to someone who is able to do this?

I have the original ECU (ISN can be read) and a donor ECU with the same Bosch and BMW part numbers.

To do it remotely would be ideal but I can post the ECU's if required.

Thanks