Originally Posted by lucid
I think this might be the case actually. I posted references to an article that stated all this, but the article is no longer available (new issue). Not sure how solid that source is, but that has been the only published info I've been able to uncover on the topic.
Not sure who the EDC supplier is, would like to know. This document
seems to imply BMW makes their own system with vendor supplied valves. This seems unlikely though, seems like a part BMW would buy from a supplier.
However, in any case the system works by a valve controlling the oil flow, either a coil or direct electrical type of valve. It is not a magneto-rheological fluid system nor does it contain permanent magnets.