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BMW Power Steering Reservoir Replacement
 
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Pelican Technical Article:

BMW Power Steering Reservoir Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$

Talent:

**

Tools:

Set of sockets 10mm, flathead screwdriver, hose clamp pliers

Applicable Models:

BMW 325i Sedan (2006)
BMW 325xi Sedan/Wagon (2006)
BMW 328i xDrive Coupe (2009-13)
BMW 328i xDrive Sedan (2009-11)
BMW 328i xDrive Wagon (2009-12)
BMW 328i/xi Coupe (2007-13)
BMW 328i/xi Sedan (2007-11)
BMW 328i/xi Wagon (2007-12)
BMW 330i/xi Sedan (2006)
BMW 335i xDrive Coupe (2009-13)
BMW 335i xDrive Sedan (2009-11)
BMW 335i/is/xi Coupe (2007-13)
BMW 335i/xi Sedan (2007-11)

Parts Required:

Power steering reservoir, power steering hoses, hose clamps, power steering fluid

Hot Tip:

Suction fluid out of power steering reservoir before removing it

Performance Gain:

Remedy power steering leaks and noise

Complementary Modification:

Replace power steering hoses

Inside the power steering fluid reservoir there is a small filter that can become restricted. The filter is not serviceable separately; if you believe it to be a problem, replace the power steering fluid reservoir. I have seen noisy pumps remedied by replacing the power steering reservoir. If yours is groaning, try replacing the reservoir first. You can also use this article if you need to replace the hose clamps on the power steering reservoir hoses, as they have a tendency to leak over time. There are two hoses off the reservoir that I usually replace, one goes to the cooler, the other to the pump.

In this article, I'll go over the steps involved with replacing the power steering reservoir and bleeding the power steering pump.

Place an oil drain pan under left side of engine.

Remove engine covers. See our tech article on engine cover removing.

Next you have to remove the air filter housing and intake air ducts from your engine. Use the steps below that apply to your vehicle, then complete procedure with steps following the air filter housing and duct removing steps.

Note the power steering reservoir is mounted in a different place on turbocharged models.
Figure 1

Note the power steering reservoir is mounted in a different place on turbocharged models. (green arrow) Once you get the air cleaner out of the way, follow the steps below, it is very similar and you can use the photos below to help you with the procedure.

Models without turbo-charger:
Working at front of radiator support, remove two T20 Torx fasteners from the intake duct.
Figure 2

Working at front of radiator support, remove two T20 Torx fasteners from the intake duct. (green arrows)

Working at intake air duct connection at air filter housing, using a small flathead screwdriver, release retaining tabs on each side and pull duct off.
Figure 3

Working at intake air duct connection at air filter housing, using a small flathead screwdriver, release retaining tabs on each side and pull duct off.

Then, pull intake duct out of radiator support and remove from vehicle.
Figure 4

Then, pull intake duct out of radiator support and remove from vehicle. (green arrow)

Then loosen hose clamp (green arrow) and remove two 10mm air filter housing fasteners.
Figure 5

Then loosen hose clamp (green arrow) and remove two 10mm air filter housing fasteners. (yellow arrows)

Disconnect mass air flow sensor electrical connector by releasing tab with small flathead screwdriver and pulling connector out of sensor.
Figure 6

Disconnect mass air flow sensor electrical connector by releasing tab with small flathead screwdriver and pulling connector out of sensor. (green arrow)

Remove air filter housing from vehicle by lifting up and disconnecting duct from mass air flow sensor.
Figure 7

Remove air filter housing from vehicle by lifting up and disconnecting duct from mass air flow sensor. Skip down the power steering reservoir portion of this article now.

Models with turbo-charger:
Working at front of radiator support, remove two T20 Torx fasteners for the intake duct.
Figure 8

Working at front of radiator support, remove two T20 Torx fasteners for the intake duct. (green arrows)

Working at intake air duct connection at air filter housing, using a small flathead screwdriver, release retaining tabs (green arrow) on each side and pull duct off.
Figure 9

Working at intake air duct connection at air filter housing, using a small flathead screwdriver, release retaining tabs (green arrow) on each side and pull duct off. Then, pull intake duct out of radiator support and remove from vehicle.

Working at front of air filter housing, using a flathead screwdriver loosen air duct hose clamp.
Figure 10

Working at front of air filter housing, squeeze connector and pull to disconnect vacuum hose, then pull vacuum hose out of mount. (green arrow)

Once hose clamp is loose, reach below upper radiator hose and slide hose (green arrow) off air filter housing.
Figure 11

Working at front of air filter housing, using a flathead screwdriver loosen air duct hose clamp. (green arrow) Then loosen boost pipe hose clamp (yellow arrow). Leave boost hose connected for now.

Working at rear of air filter housing, using a flathead screwdriver loosen air duct hose clamp.
Figure 12

Once hose clamp is loose, reach below upper radiator hose and slide hose (green arrow) off air filter housing.

Pull electrical cable up off mount.
Figure 13

Working at rear of air filter housing, using a flathead screwdriver loosen air duct hose clamp. (green arrow) Next, you will have to detach electrical cables from intake air pipe. (yellow arrow)

Pull electrical cable up off mount.
Figure 14

Pull electrical cable up off mount. You may have to wiggle the rubber grommet side to side to get it to come off mount. Remove all three electrical cables.

Once the electrical cables are removed, you will have to pull the air filter up and out of the rubber mounting grommets.
Figure 15

Once the electrical cables are removed, you will have to pull the air filter up and out of the rubber mounting grommets.

Next, pull hose up and off air pipe.
Figure 16

Next, you will have to unlock and disconnect the front boost recirculation hose. There is a gray lock, rotate this lock counterclockwise about 45° to unlock it( green arrow). This style hose lock can be hard to get off due to time and debris entering collar. If so, you can rotate it using channel locks, but be careful not to damage the hose or lock, they are made out of plastic.

Working at the boost recirculation valves, remove the vacuum hose from each valve by pulling off.
Figure 18

Next, you will have to unlock and disconnect the rear boost recirculation hose. There is a gray lock, rotate this lock counterclockwise about 45° to unlock it. This style hose lock and can be hard to get off due to time and debris entering collar. If so, you can rotate it using channel locks, but be careful not to damage the hose or lock, they are made out of plastic. Next, pull hose up and off air pipe. It should slide off easily, if it does not, lock is not fully disengaged.

Working at the boost air pipe, remove T27 Torx fastener.
Figure 19

Working at the boost recirculation valves, remove the vacuum hose from each valve by pulling off. Be careful not to damage hose or valve when removing.

Working at throttle body, using a flathead screwdriver, remove intake air pipe locking clip.
Figure 20

Working at the boost air pipe, remove T27 Torx fastener. (green arrow)

Disconnect boost pipe from connection at radiator support, then gently wiggle pipe off throttle body.
Figure 21

Working at throttle body, using a flathead screwdriver, remove intake air pipe locking clip. (green arrow)

First you will have to remove the power steering reservoir from its mounting bracket.
Figure 22

Disconnect boost pipe from connection at radiator support, then gently wiggle pipe off throttle body. Once pipe is clear of throttle body, remove from vehicle. Skip down the power steering reservoir portion of this article now. 

 Power Steering Components replacing: Use a suction pump to suck the power steering fluid out of the reservoir.
Working next to power steering reservoir, unclip vacuum hose clip by unclipping and opening.
Figure 23

First you will have to remove the power steering reservoir from its mounting bracket. You do not have to disconnect the hoses yet. Remove two 10mm mounting fasteners. (green arrows) Then remove two silver washers from power steering reservoir grommets. Be careful not to lose the washers.

Remove power steering reservoir (green arrow) from mounting bracket and guide under vacuum hose (yellow arrow) and move toward area where air filter housing mounts.
Figure 24

Working next to power steering reservoir, unclip vacuum hose clip by unclipping and opening. (green arrow)

Now it's time to remove the hoses from the power steering reservoir.
Figure 25

Remove power steering reservoir (green arrow) from mounting bracket and guide under vacuum hose (yellow arrow) and move toward area where air filter housing mounts.

Then, remove the 10mm reservoir clamping bolt from the bracket.
Figure 26

Now it's time to remove the hoses from the power steering reservoir. Use a flathead screwdriver and lever open the hose clamp. (green arrows) Once you get the hose clamps open, pull the hoses straight off the reservoir, be ready for any excess fluid to leak out.

To remove the hose at the cooler connection, press in the white plastic collar, then pull the hose straight off.
Figure 27

Then, remove the 10mm reservoir clamping bolt from the bracket. Pull the bracket off the old reservoir and transfer it over to the new pump. Do not tighten the bracket yet, wait until you install the new hoses, this way you can align it and the hoses. Remove the hose clamp at the power steering pump hose, just like you did at the reservoir. Then remove the hose and install the new one. Do not crimp the new hose clamp yet.

Install the reservoir and tighten the two 10mm fasteners.
Figure 28

To remove the hose at the cooler connection, press in the white plastic collar, then pull the hose straight off. (green arrow) Install the new hose to the cooler. Snap the cooler hose on and be sure the locking collar engages. Give it a pull and make sure it doesn't come off.

Once you are sure all the hoses have clearance and are properly installed, crimp the new hose clamps using a hose crimping tool.
Figure 29

Install the reservoir and tighten the two 10mm fasteners. Then align the hoses with the arrows on the reservoir.(green arrows point to reservoir and hose) This will ensure a proper fit, just double check the hoses are not close enough to rub on anything. Then crimp the hose clamps using a hose clamp tool. If your hoses do not have arrows on them, leave the hose clamps un-crimped for now. Tighten the clamp on the reservoir.

30
Figure 30

Once you are sure all the hoses have clearance and are properly installed, crimp the new hose clamps using a hose crimping tool. Reassemble the air filter housing and ducts. Then fill the power steering fluid with new fluid.

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Comments and Suggestions:
Andrew Comments: I don't have a picture on hand but I'm using BMW part number 32-41-6-751-127-BOE clamps for an '08 328xi.
May 3, 2017
  Followup from the Pelican Staff: With those, you engage the latch (hook) on the clamp. Then crimp the flat spot to tighten. - Nick at Pelican Parts  
Andrew Comments: I should mention that I was using the OEM BMW hose clamps. My Lisle hose crimp pliers would not even open wide enough to use for closing the clamp.
May 1, 2017
  Followup from the Pelican Staff: Then you will need the right pliers. Knipex may make them or someone like Stahwille. - Nick at Pelican Parts  
Andrew Comments: For the hose clamps, do the two little ears just catch on the tab? It doesn't seem super secure. Is there something further to do to crimp it tight?
May 1, 2017
  Followup from the Pelican Staff: Can you share a photo of the clamp you are using. Too many variations out there. - Nick at Pelican Parts  
Jamie Comments: Did you only replace one of the power steering hoses? The one you replaced looks like mine that looks like is sweating as well. However the hose right beneath it looks like it is sweating too, but can't tell if it's just residue from the top hose. Could you provide part numbers for those? This is for a 2008 328XI. Thanks!
December 13, 2016
  Followup from the Pelican Staff: You'll need to replace whatever is leaking. Usually the hose clamps fail, also the ends of the hoses. Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
Fernando Comments: Can you provide a link to the tool you used for the clamps?
Thank you!
November 4, 2014
  Followup from the Pelican Staff: These will do it:

http://www.pelicanparts.com/cgi-bin/smart/S-mart.cgi?command=add&weight=0.9&itemid=1847-1-M970&itemname=Axle%20Boot%20Clamp%20Pliers%2C%20Brand%3A%20Hazet&itemprice=117.50 &itemquant=1 - Nick at Pelican Parts
 
Dave Comments: Hi - as of July 9, 2014, the picture links don't seem to expand and only bring you to the top of the article page. Is there a way someone could fix this glitch?

Thanks.
July 9, 2014
  Followup from the Pelican Staff: The photo links and the photos work for me. Just checked. - Nick at Pelican Parts  

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Page last updated: Tue 9/19/2017 02:27:08 AM