31 00... Information on replacing shock absorbers: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2012 BMW 328xi, 2011 BMW 328xi, 2010 BMW 328xi, 2009 BMW 328xi, and 2008 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
If one shock absorber is damaged, it is only necessary to replace both shock absorbers when the car has driven in excess of 80 000 km.
Exception: On all M models, when a limit value is exceeded on one side, it is still necessary always to replace both shock absorbers on the relevant axle.