3241060 Removing and installing or replacing hydraulic steering vane pump (N51, N52, N53)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 335i, 2010 BMW 328i, and 2010 BMW 323i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: DANGER OF POISONING if oil is ingested/absorbed through the skin!
DANGER OF INJURY if oil comes into contact with eyes and skin!

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

IMPORTANT: Aluminium-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released .
The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage).

Recycling

Catch and dispose of hydraulic fluid in a suitable collecting vessel.

Observe country-specific waste disposal regulations

Necessary preliminary work

Draw off and dispose of hydraulic fluid from fluid reservoir
Remove intake silencer housing
Remove BELT PULLEY
Remove FRONT UNDERBODY PROTECTION
Remove radiator seal

Release hose clamp (1) and detach intake pipe (2) from vane pump.

Installation note:

Markings on intake pipe and vane pump connection must match up.

Fig 1: Identifying Hose Clamp And Intake Pipe

Courtesy of BMW OF NORTH AMERICA, INC.

Release bolt (1) and remove bracket with refrigerant line.

Unfasten screws (2).

Installation note:

Replace aluminum screws.

Observe screwing sequence!

Fig 2: Identifying Screws And Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Release banjo bolt (1) and disconnect pressure line.

Installation note:

Replace all sealing rings (D).

Make sure pressure line is laid without tension and with sufficient distance to adjoining components.

Fig 3: Identifying Sealing Rings With Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Release bolts (2) and remove vane pump towards bottom.

Installation note:

Replace aluminum screws.

Observe screwing sequence!

Screwing sequence

Secure vane pump with screws
Tighten side screws to 2 Nm
Tighten front screws to 2 Nm
Tighten down front screws
Release screws at side and check bolting points for gap freedom
Tighten down side screws.

After installation

Fill and bleed HYDRAULIC SYSTEM
Check pipe connections for leaks