Hi,
Which BMW is it for?
I'd suggest asking in the section relevant to the car as there's more chance of owners who've tried/know more about this question as this section is for car audio and associated electronics.
If there's no knowledge, you may well need to have the sensor reverse engineered and the components identified to perhaps determine on how it works with respect to design and if/any voltages used.
Cheers, Dennis!
Its for E90, I guess it should be similar to other models.
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