On a MacPherson strut car, sometimes the springs of the front suspension will bind in their seats, and when turning the wheel sharply at low speed (or at a standstill) you end up with a kind of "bung, bung, bung" sound as the spring intermittently lets go.
I've had this issue on a couple of vehicles. I can be sure that the noise is coming from the struts (the springs, really), because of the very distinctive sound that comes from the ringing of the springs.
New strut-top bearings generally help, but I find that the noise sometimes comes back rather quickly. What can be done to address this issue?