51 24 151 Removing and installing/replacing hydraulic cylinder for rear lid (electrohydraulic/fully automatic)

Necessary preliminary tasks: 

• Disconnect HYDRAULIC LINES ON HYDRAULIC UNIT 
• Remove roofliner. See REMOVING AND INSTALLING ROOFLINER (ON VERSION WITHOUT PANORAMA SUNROOF)  or REMOVING AND INSTALLING ROOFLINER (ON VERSION WITH PANORAMA SUNROOF) 
• Remove REAR SPEAKER on left side

Lift hydraulic cylinder (1) in direction of arrow out of ball pin (2).

Repeat procedure on rear lid.

Fig 1: Lifting Hydraulic Cylinder Of Ball Pin

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Disconnect plug connection (1) through opening of left rear speaker.

Fig 2: Identifying Plug Connection

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Unclip hydraulic lines (1) from bracket (2) and feed out through side panel (3) on inside.

Fig 3: Identifying Hydraulic Lines And Side Panel

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Unclip hydraulic lines (1) from brackets (2).

Feed hydraulic lines (1) out of grommets (3 and 4) in direction of arrow.

Installation: 

CHECK FLUID LEVEL IN HYDRAULIC UNIT , correct if necessary.

Fig 4: Identifying Hydraulic Lines Of Bracket

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Installation: 

Cover (2) must be correctly connected with screws (1).

Replacement: 

Only remove transportation guard of piston rod immediately before attaching ball socket.

Once the new hydraulic cylinder (2) has been installed, the system must detect the "Rear lid open" deactivation point.

• Disconnect and connect battery.
• Press button on rear lid.
• Hydraulic unit runs for 13 seconds (regardless of rear lid setting) in "Open" direction.

Fig 5: Identifying Cover With Screws

Courtesy of BMW OF NORTH AMERICA, INC.