The car was still drive able with the drivers side mount incomplete. The picture below is the top side bushing of the drivers engine mount, so the mount rests on top of this and was being pulled off of it. The bushing took a beating, but luckily they include spares of a different hardness (go ahead and use the harder of the two). Kudos to engine mounts designers, the bushing sacrificed itself and held itself in place avoiding damaging the rest of the mount or sub-frame. There is a chunk missing from the ridge that holds the mount in place. Sorry I don't remember the size of the replacement bolt, I just called the manufacturer and they looked it up for me.