Necessary preliminary tasks

Only if removing left underbody panelling:

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.