The module internal failure is lost contact between module connector an circuit board. So regarding diagnostics it will show the same as lost signal from the sensor. If the sensor is a known working one and the wiring between sensor and module is checked, it has to be the module internal wiring.

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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