I hit a Pot Hole in the road very hard a week ago whilst doing maybe 40mph. Since then my front left hand side suspension has been knocking. The knocking noise is more prominent when I turn left. I guess most of the weight of the car is transferred to the right hand side at this time. it almost sounds like I have lost the dampening effect and the suspension is bouncing on the spring? Any ideas as to what this may be? where should I check first?

__________________
E90 318i 2007 N46 2.0 Manual
E53 X5 2004 M54 3.0 Sport Auto
E83 X3 2004 M54 2.5 Auto