I've got an 08 bf sedan & the vibration started 3 weeks age, only minor to start but now it has increased heaps, its when you use accelerator pedal from lights to 40km/hr then if you hit reset on cruise & car accelerates but vibrations gone. from lights the front lifts & the back really grinds down until you back off & back lifts & vibration goes? if you go around a bend & hit a hole the back flicks out.this has xr6 suspension fitted & I noticed no rear bump stops left.