i had a broken bolt too, but got an ez out kit and was able to remove the broke stud fairly easily.Yes, they do. It's not a huge deal to drill out the bolts with a cordless drill and re-tap them (to a same or larger size), just go slow and use a lot of lubricant. You'll break a few bits in the process but they are pretty cheap. I had to drill out the front two bolts on mine and switch them from M6 to M8.