Is the bushing cracked or it is designed with two"cracks"? Front control arm rear bushing. Do they go bad a lot? Is that pretty common problem? there is suspension knock, which problem is most common for X-type suspension?

 

That bushing looks ok, it may be the lower ball joint or the most likely culprit is the sway bar end links.

 

i would also look at the sway bar bushings bit of a pain to change but that stopped the knocking for me.