If you are going to have to drill it out, first hit the threaded part on top with some PB Blaster or Kroil penetrating fluid. Then go out and find a left handed drill bit and extracter of the right size (bolt is a M10X1,5X20-10.9). Drilling won't be easy as this is a grade 10.9 bolt. P/N 31106766780

I have a Mac tools set of left handed drill bits and extractors and they work like a charm, every time. Don't cheap out here (though I got my set on ebay).

Go with a slow drill speed, strong pressure, a steady hand, and lots of penetrating oil as lubricant/heat transfer fluid.

__________________
Kirk
Las Vegas
2016 X5 40e Mineral White/Black Dakota Leather, ZLL, ZCW, ZDA, ZDB, ZPP, multi contour seats, rear side window shades, HK stereo
2011 E90M3, 6-speed manual