32 41 037 Removing and installing power steering pump for power steering gear with Dynamic Drive (N52, N53)

WARNING: This page is about a different car, the 2010 BMW 528i, 2009 BMW 528i, and 2008 BMW 528i. However, it is still accessible from the selected car via links, so may be relevant.

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

NOTE: When replacing power steering pump:
Fluid reservoir must be replaced in event of metal abrasion, sluggish pump shaft or increased wear!
The filter integrated in the fluid reservoir can only absorb a limited amount of foreign particles. If the filter clogs, the hydraulic system can no longer be sufficiently protected.
Metal abrasion is perceived in the fluid reservoir as metallically glittering hydraulic fluid.
It is only necessary to replace the fluid reservoir because of leaks (e.g. at hose connections) only in the event of the unavoidably high ingress of dirt.

Necessary preliminary tasks:

Draw off and dispose of hydraulic fluid from fluid reservoir
Manual transmission incl. SMG: Relieve tension on drive belt and remove from power steering pump belt pulley
Automatic transmission: Remove drive belt

Release bolts (1).

Tightening torque 32 41 5AZ . See 41 PUMP AND OIL SUPPLY .

Automatic transmission: Detach bracket for hydraulic lines from oil sump and slide downwards.

Unfasten banjo bolt (2).

Remove Dynamic Drive pressure line (3) with bracket from power steering pump and lay to one side.

Fig 1: Identifying Banjo Bolt, Dynamic Drive Pressure Line And Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace all sealing rings.

Make sure hydraulic line is laid without tension and with sufficient spacing to adjoining components.

Tightening torque 32 41 3AZ . See 41 PUMP AND OIL SUPPLY .

Unfasten hose clip (1).

Detach suction line (2) from power steering pump.

Automatic transmission: Detach bracket for hydraulic lines from oil sump.

Unfasten banjo bolt (4).

Disconnect pressure line (3) from power steering pump.

Fig 2: Identifying Hose Clip, Suction Line, Banjo Bolt And Pressure Line

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace all sealing rings.

Make sure hydraulic lines are laid without tension and with sufficient spacing to adjoining components.

Tightening torque 32 41 3AZ . See 41 PUMP AND OIL SUPPLY .

Remove intake filter housing . See 13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING .

Version with active front steering: Disconnect plug connection (1).

Release screw (2).

Fig 3: Identifying Plug Connection And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace aluminum screws.

Observe screwing sequence.

Release bolts (1).

Remove power steering pump (2) downwards (in automatic transmission upwards).

Installation:

Replace aluminum screws .

Observe screwing sequence.

Fig 4: Identifying Power Steering Pump Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Screw-fastening sequence:

Secure power steering pump with screws
Tighten side screw to 2 Nm
Tighten front screws to 2 Nm
Tighten down front screws to jointing torque and angle of rotation
Tightening torque 32 41 1AZ . See 41 PUMP AND OIL SUPPLY .
Release screw at side and check screw fastening point for gap freedom
Tighten down side screw to jointing torque and angle of rotation
Tightening torque 32 41 1AZ . See 41 PUMP AND OIL SUPPLY .

After installation:

Fill and bleed hydraulic system or power steering (version with Dynamic Drive) .
Check pipe connections for leaks
If necessary, carry out initial Dynamic Drive operation . See 37 10 001 INITIAL OPERATION WITH TEST RUN OF DYNAMIC DRIVE .