63 21 101 Replacing sealing frame for left or right rear light

Necessary preliminary tasks:

Remove sealing frame for rear light (1) from rear light (2).

Installation:

Sealing frame for rear light (1) is centered via guides (3)
Make sure sealing frame for rear light (1) is correctly positioned on rear light (2)

Fig 1: Identifying Rear Light, Sealing Frame And Guides

Courtesy of BMW OF NORTH AMERICA, INC.