54 37 195 Removing and installing/replacing right hydraulic cylinder from roof shell, middle

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2013 BMW 328i, 2012 BMW 328i, 2011 BMW 328i, 2010 BMW 335i, and 2010 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove roof lining
Have roof module supported partially by helpers

CAUTION: Hydraulic fluid may emerge from the disconnected lines and the open connections on the hydraulic cylinder.
Protect components and work area with suitable materials (e.g. cloths).

NOTE: Hydraulic system must be at zero pressure.
Open screw on hydraulic unit 1.5 turns.

Lever out clips (1).

Fig 1: Identifying Hydraulic Unit Clips

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Drive out bearing pins (1 and 2).

Installation:

Bearing pin (1) is shorter than bearing pin (2).

Remove hydraulic cylinder.

Fig 2: Identifying Hydraulic Unit Bearing Pin

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Unfasten plug connection (1) and disconnect.

NOTE: Plug connection on right roof shell cylinder can be incorrectly positioned.
The plug connection must be repositioned if it does not point to the outside of the vehicle.

Fig 3: Identifying Plug Connection

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Disconnecting hydraulic lines from cylinder:

Disconnect cable straps.

Installation:

Replace cable straps.

Slide open retaining rings (1) with screwdriver.

Detach hydraulic lines (2).

IMPORTANT: Protect joints (lines and cylinder) against dripping fluid, e.g. with a cleaning cloth.
Observe hose markings.
Make sure airbag hydraulic lines and wiring harness are exactly routed.

Fig 4: Detaching Hydraulic Lines

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NOTE:

Carry out operational check.
Check fluid level.