I've got a very random and inconsistent knock in driver front wheel area. It doesn't occur at any regular instance as when I hit s bump or anything. If at all, it's with any undulating surface. What could the issue be do you guys think?

 

broken/bent swaybar endlink? My road is an "undulating surface", and that's when I first started noticing the nice clunk. Do you have excessive body-roll on turns?

 

+1. Yep.