Clunking noise over rough pavement

[NYC-SE]

Originally Posted by Exiwolfman

Grab the car by the roof while standing next to it and rock the car back and forth... This is easy way to see if ur swaybar links have gone bad....cos if car drives fine one would not notice this unless over bumps but like u said under warranty so I don't see why wait drive it to Toyota and have it fixed.
Also if it was the bolts as you may think your car would drive with extreme unpredictablety and would be specially noticeable at braking ...as the car would feelike the front end want to rock under, best way that I can describe this.
My first thought �� bad swaybar link.

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My original thought was sway bar links as well, but they were tight and looked good when I inspected them. Anyway I took your advice and set the Yaris a rockin' today. I mean I got violent with it. I had it rocking and rolling and good. Not a peep out of the suspension. I also spent the majority of my day on the road and not once did it make any noise.

Last night I re-read the above referenced thread and I'm beginning to think maybe it is the control arm bolts. The fact that there were posts concerning 3rd gen cars got my attention. I did have a look underneath again today and the bolt heads look OK, put a wrench on them just to see if they were obviously loose. They were not. I did not attempt to retorque to full value out of fear of possibly snapping them. Reading that thread got me scared.

As I said previously the car still performs fine. Unless things change for the worse I'm just going to leave it be until I have some free time after New Years and let Toyota figure it out then.