Unless Bosch has improved quite a bit, they are an iffy proposition for a BMW in my experience. Problems seem to follow their installation into a BMW. Hesitation, starting issues, etc.

I prefer the Denso iridiums, myself, but I'm a gearhead. I go so far as to index the plugs in every car, not just the race car. It only takes a few more minutes to find the right plug/cylinder combo so I do.

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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