51 47 491 Removing and installing/replacing rear underbody protection
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:
Illustration only an example. There may be differences in detail in the case of other models.
Release screws along line (1) and remove underbody protection (2).
Tightening torque 51 75 1AZ