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

WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove LUGGAGE COMPARTMENT FLOOR TRIM PANEL

IMPORTANT:

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).

Tightening torque 54 37 09AZ .

Remove battery rollover protection (2).

Remove insulating mat (3).

Fig 1: Identifying Battery Rollover Protection And Insulating Mat

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Unfasten plug connection (1) and disconnect.

Fig 2: Identifying Plug Connection

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Press release and detach relay (1) from holder.

Fig 3: Detaching Relay From Holder

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Unlock plug connections (1) and disconnect.

Detach cable strap.

Installation note:

Plug connections are coded against incorrect assembly.

Replace defective cable strap.

Fig 4: Locating Defective Cable Strap

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IMPORTANT: Protect joints (lines and hydraulic unit) against dripping fluid, e.g. with a cleaning cloth.

Disconnect hydraulic lines from hydraulic unit:

Release screws.
Detach hydraulic lines

Installation note:

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

Fig 5: Locating Hydraulic Lines Screws

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Disconnect hydraulic lines from hydraulic unit:

Release screws.
Detach hydraulic lines
Remove hydraulic unit (drive).

Installation note:

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

Check OIL LEVEL or top up if necessary.

Fig 6: Locating Screws Of Hydraulic Lines

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Before start-up, make sure both shutoff valves are closed.

Close both shutoff valves with a hexagon socket as necessary.

Fig 7: Closing Shutoff Valves With Hexagon Socket

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