So this seems like a common issue that spans over several years and models I have personally confirmed this safety hazard on my 09 135 and on my friends 08 128 and on my friends 2011 328 sedan I suggest you check yours if for any reason for safety reasons it only takes about 5 mins of your time! As for the fix I have contacted my service advisor and waiting on a reply on what if anything BMW is willing to do about this huge safety concern? Just passing the word along! Here is some pics of mine and a post on m3post about this same issue! This is not normal wear and tear this is a huge issue!
http://www.m3post.com/forums/showthr...4#post19076484