How to Install Rear Speakers on a BMW Z3

1. Locate the speaker grilles for the rear speakers on the rear side panels of the interior. The round speaker grille is mounted into a larger trapezoid-shaped piece of plastic. Pry this panel out with your panel tool to expose the speaker.
2. Unscrew the four screws holding the speaker into place. Grasp the speaker by the edge and pull it out.
3. Disconnect the wiring connected to the speaker. Connect the wiring to the new speaker and mount the speaker into the opening with the screws. Snap the panel back in place over the speaker.