The left turn signal fails to activate when pressing down on the turn signal lever. Happens intermittently. Vinfast repair center says they can not duplicate the problem. Online forums report this is a widespread problem which Vinfast ds not know how to repair. This is a major safety concern because when you press down on the lever you assume your turn signal is on and therefore you change lanes. But many times I’m changing lanes and the signal is not on. Therefore it could cause a collision with another vehicle.