113470 Socket wrench insert Mechanical tool: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2016 BMW 328i xDrive, 2016 BMW 328d xDrive, 2015 BMW 328i xDrive, 2015 BMW 328d xDrive, and 2014 BMW 328i xDrive. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
(Screwdriver insert) Hexagon socket SW5/3/8" connection, shaft length 60 mm, for slackening and tightening chain sprockets on the camshaft