Removing And Installing/Replacing Front Differential (M54): Installation:

WARNING: This page does not describe the selected car, but rather 120 other vehicles, including the 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, and 2005 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.

Replace sealing ring (1).

Courtesy of BMW OF NORTH AMERICA, INC.
Insert sealing ring (1) in groove.
Coat sealing ring (1) with antiseize agent.
Sealing ring, refer to BMW Parts Service.

Important!

Replace output shaft radial seal.