If difficulties arise when turning the steering wheel quickly, this may be due to insufficient tension on the drive belt or belt failure.
To eliminate these faults, contact a BMW workshop.
Servotronic*
If as the vehicle speed increases, the steering wheel becomes easier to move, then this indicates a failure in the electronics. For troubleshooting, contact a BMW workshop.
Attention: If the hydraulic booster fails, the force required to turn the steering wheel increases!