Reversing out of a parking space we heard a very loud sound followed by a grinding/scraping noise from the front right. At first we thought we'd run over something, but there was nothing under or anywhere near the car. Moving the car forwards, the car felt like it first jacked up a bit on the front right, then moved smoothly, but still with the scraping noise. Since we were very close to home we drove home at very low speed with varying degrees of scraping and other noises whenever we went over bumps. Tesla towed the car to Watertown and are replacing a control arm as I write this the next day. There have been several reports of this kind of failure happening, so I wonder if they've got a systematic problem.