Necessary preliminary tasks

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Only if removing left underbody panelling:

Remove rear UNDERBODY PROTECTION

NOTE: Work shown on 320d by way of example, deviations in detail are possible in other models.

Release plastic nuts.

Release screws (1, 2 and 3).

Release expansion rivet (4).

Installation:

Replace faulty expander rivets.

Make sure underbody panelling is correctly seated.

Fig 1: Identifying Expansion Rivet And Screws

Courtesy of BMW OF NORTH AMERICA, INC.