Necessary preliminary tasks

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Detach wheel arch cover . See 5171041 REMOVING AND INSTALLING/REPLACING REAR LEFT OR RIGHT WHEEL ARCH COVER or 5171039 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT WHEEL ARCH COVER (REAR SECTION) from front/rear side member cover

Release screws (1).

Fig 1: Identifying Side Sill Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip panel (1) at holders (2) in direction of arrow and remove.

Fig 2: Removing Panel

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Before installation, soak holders (1) in water.

If necessary, detach holders (1) from body and fit on panel (3).

If necessary, detach grommets (2) from holders (1) and place on body.

If necessary, replace faulty holders (1) and grommets (2).

Fig 3: Identifying Grommets And Holders

Courtesy of BMW OF NORTH AMERICA, INC.