MRF (Magneto Rheological Fluid) in the Damper Unit
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
Variable suspension damping force is achieved by controlling the intensity of magnetic flux in the damper piston. The orientation of iron particles suspended in the damper oil is changed as the fluid flows through the magnetic field, thereby changing the effective viscosity of the fluid. The amount of change in the fluid's behavior is proportional to the amount of electrical current supplied to the windings in the piston.