Quote from marzman :

Is it your replay? Default AI setup?

Yes, my replay. The setup is not the default but it is one that has been used for racing/hotlapping for quite a while w/o incedent. The bumps in that section are small and the suspension setup is reasonable. To me this looks like either some wierd destructive resonant frequency happening, a bug, or a random structural failure (which is kinda cool since structural failures do occur in reality). Be nice to know the real answer though.

Here's a replay of an AI driving an FBM when, for no apparent reason, the right-front suspension collapses. It happens on the straight of lap 2 just before turn 1. The car sustained no previous damage. There are some small bumps on the track right where it collapsed, but I'm surprised they could cause this. Is this a bug?