54 37 188 Removing and installing/replacing hydraulic cylinder for kinematics box on left

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work

Remove LUGGAGE COMPARTMENT WHEEL ARCH TRIM

IMPORTANT: 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).

IMPORTANT: Soft top compartment lid tilts shut when system is depressurized and must be supported with suitable auxiliary equipment.

Fig 1: Identifying Top Compartment Lid

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

Fig 2: Closing Shutoff Valve On Hydraulic Unit Using Allen Key

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Unlock retaining clip (1). Turn bearing journal downwards (2).

Fig 3: Twisting Bearing Journal

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Remove bearing journal (1).

Fig 4: Removing Bearing Pin

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Detach retaining clip (1) with screwdriver. Drive out bolt (2) on side.

Fig 5: Removing Pin

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Feed out hydraulic cylinder (1). Unfasten plug connection (2) and disconnect. Right side only: Unlock plug connection (3) for Hall-effect sensor and disconnect.

Fig 6: Removing Hydraulic Cylinder

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Replacement only: Disconnect hydraulic lines from cylinder.

IMPORTANT: Protect separation points (lines and cylinder) against dripping fluid, e.g. with a cleaning cloth. Observe hose markings.

Detach cable strap. Open retainer (1) at bottom/top on cylinder with screwdriver. Detach hydraulic lines (2).

Installation note: Carry out function check. Check fluid level.

Fig 7: Detaching Hydraulic Lines

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