51 42... Replacing speaker trim on rear left or right door trim panel

Necessary preliminary tasks:

Open plastic weld joints at marked points.

Unlock catches (1).

Remove speaker frame (2).

Fig 1: Locating Catches And Speaker Frame

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Install new loudspeaker finisher (2).

Catches (1) must be correctly seated in corresponding guides.

Secure retainers (3) as pictured to all marked plastic guides.

Speaker trim (2) must be secured without play on door trim panel.

Fig 2: Locating Catches, Speaker Trim And Retainers

Courtesy of BMW OF NORTH AMERICA, INC.