32 13 066 Replacing active front steering hydraulic steering gear (N55)

WARNING: Secure engine in installation position with special tool to prevent it from falling down. See INSTALLATION POSITION (N55) , INSTALLATION POSITION (N63) , or INSTALLATION POSITION (N57) .

WARNING: Observe SAFETY INSTRUCTIONS FOR HANDLING OIL .

IMPORTANT: Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Close off line connections with seal plugs.

IMPORTANT: If the lower section of the steering shaft is separated from the steering gear/steering column, the steering column switch cluster may be damaged when the steering wheel/steering shaft is twisted!

Necessary preliminary tasks:

Draw off and dispose of hydraulic fluid from oil reservoir
Remove TRACK ROD END ON BOTH SIDES FROM SWIVEL BEARING
Remove TRACK ROD END AT BOTH ENDS OF TRACK ROD
Remove LOWER SECTION OF STEERING SHAFT from steering box
Release screw connection for WISHBONE AT BOTTOM LEFT AND RIGHT on front axle support
Release connection OF THE TENSION STRUT ON THE LEFT AND RIGHT ON THE front axle support
Lower FRONT AXLE SUPPORT

Release nuts and remove screws (1) towards bottom.

Replace screws and nuts.

Tightening torque 32 00 1AZ .

Fig 1: Hydraulic Steering Gear And Screws

G04794293

Courtesy of BMW OF NORTH AMERICA, INC.

Lower FRONT AXLE SUPPORT

Mark installation positions of pressure and return lines to hydraulic steering gear.

Release banjo bolts (1).

Disconnect pressure line (2) and return line (3) from hydraulic steering gear.

Installation note:

Replace all sealing rings.

Align pressure and return lines by way of marks and tighten down banjo bolts.

Tightening torque 32 41 5AZ (pressure line).

Fig 2: Identifying Pressure Line, Return Line And Banjo Bolts

G04794462

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 32 41 6AZ (return line).

Only on vehicles with ARS :

Loosen nut of line clip (1) on front axle support.

Tightening torque 37 13 10AZ .

Loosen line clip on anti-roll bar and set line to the side.

Tightening torque 37 13 8AZ .

Fig 3: Identifying Front Axle Support Line Clip Nut

G11105894

Courtesy of BMW OF NORTH AMERICA, INC.

Mark installation position of pressure lines to swivel motor.

Release retaining screws (1) and (2) and remove pressure lines from swivel motor.

Seal pressure lines and connections of swivel motor with suitable seal plugs.

Installation note:

Pressure lines are protected against being mixed up by means of different thread diameters on the swivel motor connection.

Tightening torque 37 13 5AZ .

Fig 4: Identifying Retaining Screws For Pressure Lines

G11105895

Courtesy of BMW OF NORTH AMERICA, INC.

Lower front axle support completely.

Fig 5: Lowering Front Axle Support

G11105896

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect plug connections (1) and (2) on steering gear.

Fig 6: Identifying Plug Connections

G11105897

Courtesy of BMW OF NORTH AMERICA, INC.

Remove hydraulic steering gear from front axle support.

Fig 7: Identifying Hydraulic Steering Gear

G04794466

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Turn steering wheel in both directions to the limit position. The airbag indicator light must not light up in the process.
Fill and bleed hydraulic system. See BLEEDING POWER STEERING UNIT or BLEEDING HYDRAULIC STEERING (VERSION WITH DYNAMIC DRIVE) .
Check pipe connections for leaks
Perform CHASSIS/WHEEL ALIGNMENT
Carry out ADJUSTMENT FOR ACTIVE FRONT STEERING
If necessary, carry out START-UP DYNAMIC DRIVE OPERATION