mx5cartalk.com

Does this help?

http://uk.answers.yahoo.com/question/in ... 405AA325Rn
http://www.ehow.com/i/#article_4686767

If you can get a wheel nut on the remains of the stud put it on but not tighten it down the use a hammer to drive the stud out, the are pressed in to the hub. If it is broken off flush with the hub us a large drift to hammer the stud out.