I have tried to repair the FSU for BMW e46 by replacing the two MOSFET transistors with equivalent: IRF3205 (and even two more powerful) but it seems they cannot do the job due to other electronic component which i cannot figure out. Even though there is a change on G -gate the transistor won't change the flow ..there must be something on the Base or Collector ... I'm stunned cause i tried repairing two of them