The BMW diagrams recommend replacing the M8x23 mounting bolts for the front strut mount whenever the mount is unbolted from the chassis on F25 X3 and F26 X6 models.
Sold individually. 6 required per vehicle.
This part is listed by BMW as BMW part number 31306851799 (31-30-6-851-799) and is described as Genuine BMW M8X23 Mounting Bolt for Front Guide Support on F25 X3 (2011-2017) and F26 X4 (2015-2018).
BMW Fitments:
X3 Series
F25 X3 (2011-2017) > X3 sDrive28i
F25 X3 (2011-2017) > X3 xDrive28d Diesel
F25 X3 (2011-2017) > X3 xDrive28i
F25 X3 (2011-2017) > X3 xDrive35i
X4 Series
F26 X4 (2015-2018) > X4 28i xDrive
F26 X4 (2015-2018) > X4 35i xDrive
F26 X4 (2015-2018) > X4 M40i xDrive
