I would research the 10 year/120k mile extended warranty and make sure the item isn't covered. Like, it is a related component or part of the larger assembly. Of course, they won't volunteer this and you'll have to do the legwork yourself. Remember, there is a two year warranty on parts and if you're still within the 10 year/120k mile limit, I'd argue they still haven't fixed the problem. Make them tell you SPECIFICALLY what parts, i.e., part numbers, they want to replace.

__________________
8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim