Do yourself a favor and have both sides done at the same time. I had one go bad and the other one went a week later...two trips to the repair shop (under warranty).

__________________
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