After market units can be and state anything. On the upper unit the plug housing seems to have 3 pins installed so it must be PWM controlled. The lower one "with control unit" seems to have all 4 pins installed indicating it's likely 3 stage with that control unit being just pre-resistor pack.

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E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
E70 X5 40d -12 M-Sport Space grey