2012 Lotus Evora

The rear upper control arm or wishbone developed a crack. The spherical joint in the wishbone started to slide forward and back under braking and acceleration. In my case, it was caught quickly and before there was an accident. However, this wishbone is one leg of a tripod that attaches the wheel to the car. If the crack were to develop into a break, it could cause a catastrophic failure leading to injury or death. Essentially, a rear wheel could fall off. The problem is clearly a pattern failure in these forged aluminum parts. Some have failed with relatively few miles on them. The failures have been confirmed through discussion on on-line forums Lotus Talk and The Lotus Forum. Evidently, the failed parts have been inspected by Lotus. There is a TSB out on the problem: From S.O.P, NA auto from MY12, see TSB 2011/19 - S/Charged (man & auto). No warning lamps related to this failure. Many owners have heard a clunk. I did not hear anything. I disco verde the failure during a routine inspection.