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Resolved
After a long time investigating this problem, I came to a conclusion that it has nothing to do with changing modules, much less spending a fortune for nothing...
The problem is caused by the Dry Braking system, for those who don't know, BMWs have this braking system, which involves "drying" the discs so that they are more effective in rain. This system is activated by the automatic windshield, that is, when it rains and the rain sensor activates and turns on the dry braking system, which starts operating every x time from around 80KM/h. This system should exert 1bar less pressure on the pads in order to only clean water and not be felt on the floor of the vehicle. When this system is malfunctioning, it causes braking (increasingly stronger over time) which causes the car to slow down momentarily. It could also be the problem for some people who feel "pits" lose slight power in some situations. (but the common point is that it is raining)
To resolve the problem there are several options:
1st replace brake oil (who REALLY knows how to do that), the oil could be compromised. Check the braking system.
2º Do not set the windshield to automatic (use manually)
3rd code the car to disable "Dry Braking"
Note: this situation is only for those who do not see any errors on the dashboard, the OBD scan does not show errors in the ABS, DST or DSC system
I hope to help many people because BMW just wants to suck us in...
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