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Geez, cmon lets all ease up. In a DHP equipped x3 in the USA, it is the shocks that are changing and it is electromagnetic, sort of. Technically, it's rheonetic fluid or Magnorheonetic fluid Rheonetic fluid can be iron particles suspended in oil. When a magnetic field is introduced the fluid changes viscosity and like magic, you get stiffer dampers. If I'm not mistaken,this technology first appeared on Cadillac Sevilles in 2002 under the name "Magneride". It is also on more common on Corvettes.
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