This happened to me last week, as soon as it broke i knew exactly what it was. I followed the instructions on this thread, it was easy getting it off and only cost me £2 to get it welded up at a local garage. But was a pain in the a*se to refit. I would recommend anyone who hasn't had this problem to get it welded up as you never know when it'll go. Luckily for me i wasn't driving fast and i was near my house when it broke.