My friend's titanium battery shield fell off by itself in his P100DL. He was driving very slowly and all of a sudden he heard a sound. He pulled over and just as the car came to a stop, the entire shield fell off along with two screws. It is quite shocking that such a 'safety feature' is only held down by 2 screws. Needless to say, Tesla will fix it, but still, we are quite appalled by the 'quality'.