51 24 150 Removing And Installing/Replacing Hydraulic Unit For Rear Lid Actuation (From 02/2003) (Electrohydraulic-Fully Automatic)

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Necessary preliminary tasks:

Have a cleaning cloth and an oil drip tray ready to catch emerging fluid.
Follow NOTES AND INSTRUCTIONS for automatic rear lid actuation (electrohydraulic-fully automatic).
Remove right LUGGAGE COMPARTMENT WHEEL ARCH TRIM .

E67 only:

Remove additional trim panel.

Unscrew nuts (1).

Remove holder and pull out hydraulic unit (2).

Disconnect plug connections (3).

When removing hydraulic cylinder only:

Unhook cable holders (5) and feed out hoses (4).

Tightening torque: 51 24 4AZ . See REAR LID LOCKS for specs.

Tightening torque: 51 24 7AZ . See REAR LID LOCKS for specs.

Fig 1: Identifying Cable Holders, Hoses, Plug Connections And Hydraulic Unit

Courtesy of BMW OF NORTH AMERICA, INC.

When removing hydraulic unit only:

Detaching hoses on hydraulic unit:

IMPORTANT:

Catch escaping fluid with a cleaning cloth/oil drip tray.

Release banjo bolts (1 and 2).

Installation:

Banjo bolt on hydraulic unit "RED"
Banjo bolt on hydraulic unit "BLUE"
Adhesive tape on hose is "red"
Adhesive tape on hose is "blue"

Fig 2: Identifying Banjo Bolts And Adhesive Tape
Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque: 51 24 1AZ . See REAR LID LOCKS for specs.

NOTE:

If the hydraulic unit (5) is replaced or stays removed for an extended period of time, seal the bores in the hydraulic unit and the hose connections for the hydraulic cylinder.

Sealing connections on hydraulic unit and hose connections for hydraulic cylinders:

Hydraulic unit:

Use seal plugs from "Small parts for hydraulic unit"* set and removed seals.

Hose connections:

Use seal plugs with cap nuts from "Small parts for hydraulic unit"* set and removed seals.

* Sourcing reference: BMW Parts Service

Installation:

Always fit new banjo bolts (1) and seals (2 and 4).

Hollow screw
Upper seal (thin)
Hose connection
Lower seal (thick)

CHECK FLUID LEVEL IN HYDRAULIC UNIT

Fig 3: Identifying Banjo Bolt, Lower Seal, Hose Connection And Upper Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Insert guide (1) into counter support (2).

If necessary, replace counter support (2).

Fig 4: Identifying Guide And Counter Support

Courtesy of BMW OF NORTH AMERICA, INC.