Also, the fact that it failed while the owner was driving down the road at 45mph doesn't mean it was caused by regular driving. A hard launch and landing could have cracked the arm at the weld, but not enough for immediate failure. Drive around for a few months, hit a few potholes, and the crack completes itself and the arm fails. Don't get me wrong, I have CAP a-arms on my car and I'm concerned, but it may not have been entirely on the manufacturer. It certainly might be a poor weld that slipped through and failed under normal conditions, but it also might have been damaged on the car.
