BMW ECU flash DIY - HOW TO GET STARTED Siemens MS43 [Ep.25]

ANYONE CAN DO THIS. I will explain what is flashing and what is tuning. What equipment is required? Is it safe? In this video we are focusing on the basics, how to get started, how to do EWS delete, how to do O2 post-cat sensor delete.

Siemens MS43 is a very common ECU (Engine Control Unit) in BMW E46, E39 and E53. The engine types are M54B22, M54B25 and M54B30. It is also popular in swap projects as there is nowadays lot of information available and it's fairly easy to flash. It is also very suitable for budget turbo projects. You can do plenty of things while tuning it, e.g so called "ghost cam tune" or "fake cam tune" where double vanos system will make your idle rough.

MS4X Wiki
https://www.ms4x.net/

Disclaimer: Even thou flashing and tuning is easy. By doing wrong stuff you can permanently damage your car. I'm not liable if something happens to your car, so at your own risk.


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