I am a software engineer. I like to remove speed limit of my M3.
I can buy another BMW ECU to flash it and keep the original ECU for service only.
Electronic devices are running concurrently and data store in different NVRAM modules.
Once there is a problem, I can reinstall my original ECU, how can I flash all the rest NVRAM for a reset?
You cannot disconnect power to flash NVRAM.
If I don't flash it all, BMW will know. I don't know what to do rather than leave it.