On bc coils running coupe 19s on an 06x sedan...have had coils maybe 5k miles or so and experiencing a shaky and very hard ride....adjusted dampening from 16 from soft to 7 from soft and in between...even sitting as passenger the car feels shaky...both balance and alignment are in check! Dealer made note on last service form to check shock absorrbers but they can't already need replacing at 5k!