52 25 055 Removing and installing/replacing gear for headrest adjustment

WARNING: This page is about a different car, the 2005 BMW 745i, 2004 BMW 745i, 2003 BMW 745i, and 2002 BMW 745i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove rear head restraint. Refer to 52 25 390 REMOVING AND INSTALLING OR REPLACING LEFT OR RIGHT REAR HEAD RESTRAINT .
Remove supplementary trim on C-pillar at bottom. Refer to 51 43 240 REMOVING AND INSTALLING/REPLACING SUPPLEMENTARY TRIM ON C-PILLAR AT BOTTOM (WITH ELECTRIC REAR SEAT ADJUSTMENT) ON LEFT OR RIGHT .
Remove trim for armrest at rear. Refer to 52 25 030 REMOVING AND INSTALLING COMPLETE ARMREST FOR REAR SEAT BACKREST .
Remove rear panel on rear seat backrest. Refer to 52 25... REMOVING AND INSTALLING/REPLACING REAR PANEL ON REAR SEAT BACKREST .
Remove four-bar lever on rear seat backrest. Refer to 52 25 018 REMOVING AND INSTALLING/REPLACING FOUR-BAR LEVER ON LEFT OR RIGHT REAR SEAT BACKREST .

Bend shaft (1) in direction of arrow and pull out of gear (2).

Fig 1: Removing Spring

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Disconnect spring (3) on left and right and remove.

Unclip wiring harness (4).

Release snap rings (1) on left and right.

Fig 2: Removing Snap Rings

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Detach component (2) on left and right.

Release screws (1).

Fig 3: Removing Gear

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Rotate shaft with carrier plates (4) in direction of arrow up to stop and remove gear (2).

Replacing shaft for backrest head adjustment:

Release screws (3) on left and right and remove shaft with carrier plates (4).