54 37 185 Removing and installing/replacing hydraulic unit (drive) for retractable hardtop

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 luggage compartment floor trim panel . See 51 47 101 REMOVING AND INSTALLING/REPLACING LUGGAGE COMPARTMENT FLOOR TRIM PANEL .

CAUTION: Hydraulic fluid may emerge from the disconnected lines and the open connections on the hydraulic unit (drive).
Protect components and work area with suitable materials (e.g. cloths).
Follow repair instructions for hydraulic system.
Do not fit hydraulic lines in kinked, crushed or transposed condition.

Release screws (1).

Remove cover (2) for hydraulic unit.

Fig 1: Identifying Cover Screws

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Cut open cable tie (1).

Installation:

Replace faulty cable ties.

Detach foam part from hydraulic unit.

Remove relay (2) from holder.

Fig 2: Removing Relay From Holder

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Unlock plug connections (1) and disconnect.

Installation:

Plug connections are coded against incorrect assembly.

Unlock plug connections (2) and disconnect.

Installation:

Order of plug connection specified by wiring harness.

Fig 3: Identifying Plug Connections

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Disconnecting hydraulic lines from hydraulic unit:

Release screws and push lockplates (1) in direction of arrow.
Detach hydraulic lines.
Remove hydraulic unit (drive).

Installation:

Hydraulic lines and connections are marked with numbers to prevent mix-ups.

Check fluid level or top up if necessary.

Fig 4: Identifying Screws And Lockplates

Courtesy of BMW OF NORTH AMERICA, INC.