54 34 005 Removing and installing/replacing hydraulic unit for convertible top drive

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2008 BMW Z4, 2008 BMW M Roadster, 2008 BMW M Coupe, 2007 BMW Z4, and 2007 BMW M Roadster. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Observe notes on EH convertible top. See 54 34... Repair instructions for hydraulic system of convertible top and convertible top compartment lid .

Necessary preliminary tasks:

Remove convertible top . See 54 34 101 Removing And Installing Complete Convertible Top .
Stow convertible top

Release screw.

Remove hydraulic unit from main bearing.

Fig 1: Removing Hydraulic Unit From Main Bearing

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Using scan tool, carry out function test
Check fluid level, remove/replenish if necessary. See OPERATING FLUIDS - SUNROOF AND CONVERTIBLE TOP .

Unclip lead clip.

Unclip acoustic cover (1) at catches (2) and remove.

Unclip cable, hydraulic lines and Bowden cable (3).

Unfasten cable clip.

Detach acoustic insulation lower section (4).

Fig 2: Detaching Acoustic Insulation Lower Section

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Hydraulic lines, cable and Bowden cable must not be kinked and clip in according to numbers on acoustic insulation lower section. They must rest very closely on acoustic insulation.

Observe following notes on installation.

Installation:

Line and cable routing, hydraulic unit, front:

Wiring harness, hydraulic unit
Upper hydraulic line, left main support
Cable ties
Emergency release Bowden cable
Hydraulic lines, right main support
Lower hydraulic line, left main support

Fig 3: Identifying Line And Cable Routing For Hydraulic Unit Front
Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Line and cable routing, hydraulic unit, rear:

Emergency release Bowden cable
Wiring harness, hydraulic unit
Hydraulic lines, right main support
Hydraulic lines, left main support

Fig 4: Identifying Line And Cable Routing For Hydraulic Unit Rear
Courtesy of BMW OF NORTH AMERICA, INC.

Close convertible top.

Disconnect plug connections (1).

IMPORTANT: Have a cloth ready to wipe away escaping oil.

Release banjo bolts (2) and (3) and remove lines.

Installation:

Blue/black cable on plug with red dot
Hose with hose labeling 12/14 on hydraulic unit connection "12/14" (connection 2)
Hose with hose labeling "11/13" on other hydraulic unit connection "11/13" (connection 3)

Fig 5: Releasing Banjo Bolts And Removing Lines
Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: If hydraulic components are to be stored for an extended period, seal off bores on hydraulic unit and hose connections for hydraulic cylinder.

Installation:

Always fit new banjo bolts (1) and seals (2 and 3) (sourcing reference: BMW Parts Service).

1 = Banjo bolt 3 = Seal, middle/bottom

2 = Seal, top 4 = Line connection

The installation position of the hydraulic hoses (4) is not prespecified.

Fig 6: Installing New Banjo Bolts And Seals

Courtesy of BMW OF NORTH AMERICA, INC.

Release emergency release screws.

Remove emergency release mechanism.

Fig 7: Removing Mechanism

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: If line connections on the hydraulic unit or the hydraulic lines remain open for an extended period (e.g. storage, waiting time), they must be protected against the ingress of moisture.