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Pelican Technical Article:
Power Steering Pump Replacement

Nick Czerula

 
Time: 1 Hour
Tab: $50
Talent:  
Tools:
13mm, 22mm, T40, T45, E12 socket, diagonal pliers, hose crimp plier.
Applicable Models:
325i (2006-13)
330i (2006-13)
330xi (2006-13)
328i (2006-13)
335i (2006-13)
Parts Required:
Power steering fluid, power steering fluid reservoir, power steering hose clamps, power steering pump bracket fasteners
Hot Tip:
Work with a cool engine
Performance Gain:
Quiet power steering pump, remedy power steering noise.
Complementary Modification:
Replace power steering hoses
 
   

   
Check out some other sample projects from the book: 
Need to buy parts for this project?
Click here to order parts for your BMW from our parts catalog
   
     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. Power steering pumps can also fail due to this restriction and if the noise is not remedied, replace your power steering pump.

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

     First you have to remove the air filter housing and intake air ducts. See instructions below that pertain to your vehicle. Then, the instructions will pick up applying to all E90 models.

     Once the air filter housing is removed, you can get to the power steering pump. However, in this tech article I will show you with the alternator removed. This made it easier to view the power steering pump and components. You could remove your alternator to make replacing the power steering pump a lot easier. If you want to go that route, see our tech article on replacing your alternator.

     Models without turbo-charger
Working at front of radiator support, remove two T20 Torx fasteners for the intake duct.
Figure 1
Working at front of radiator support, remove two T20 Torx fasteners for the intake duct. (green arrows)
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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 2
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.
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Then, pull intake duct out of radiator support and remove from vehicle.
Figure 3
Then, pull intake duct out of radiator support and remove from vehicle. (green arrow)
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Then loosen hose clamp (green arrow) and remove two 10mm air filter housing fasteners.
Figure 4
Then loosen hose clamp (green arrow) and remove two 10mm air filter housing fasteners. (yellow arrows)
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Disconnect mass air flow sensor electrical connector by releasing tab with small flathead screwdriver and pulling connector out of sensor.
Figure 5
Disconnect mass air flow sensor electrical connector by releasing tab with small flathead screwdriver and pulling connector out of sensor. (green arrow)
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Remove air filter housing from vehicle by lifting up and disconnecting duct from mass air flow sensor.
Figure 6
Remove air filter housing from vehicle by lifting up and disconnecting duct from mass air flow sensor. Models with turbo-charger
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Working at front of radiator support, remove two T20 Torx fasteners for the intake duct.
Figure 7
Working at front of radiator support, remove two T20 Torx fasteners for the intake duct. (green arrows)
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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 8
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.
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Working at front of air filter housing, squeeze connector and pull disconnect vacuum hose, then pull vacuum hose out of mount.
Figure 9
Working at front of air filter housing, squeeze connector and pull disconnect vacuum hose, then pull vacuum hose out of mount. (green arrow)
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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, 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.
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Once hose clamp is loose, reach below upper radiator hose and slide hose (green arrow) off air filter housing.
Figure 11
Once hose clamp is loose, reach below upper radiator hose and slide hose (green arrow) off air filter housing.
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Working at rear of air filter housing, using a flathead screwdriver loosen air duct hose clamp.
Figure 12
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)
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Pull electrical cable up off mount.
Figure 13
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.
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Once the electrical cables are removed, you will have to pull the air filter up and out of the rubber mounting grommets.
Figure 14
Once the electrical cables are removed, you will have to pull the air filter up and out of the rubber mounting grommets. There are two in the back and one located in the center. What I like to do is pull the front side up first, then wiggle the air filter housing until it comes out of the rear mounts. There are no fasteners holding it, just the grommets, and over time they may become stiff and will not release easily. If that is the case use caution and pull up swiftly to release.
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Next you will have to unlock and disconnect the front boost recirculation hose.
Figure 15
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. This style hose lock and can 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.
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Next, pull hose up and off air pipe.
Figure 16
Next, pull hose up and off air pipe. It should slide off easily, if it does not, lock is not fully disengaged.
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Next you will have to unlock and disconnect the rear boost recirculation hose.
Figure 17
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 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.
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Working at the boost recirculation valves, remove the vacuum hose from each valve by pulling off.
Figure 18
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.
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Working at the boost air pipe, remove T27 Torx fastener.
Figure 19
Working at the boost air pipe, remove T27 Torx fastener. (green arrow)
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Working at throttle body, using a flathead screwdriver, remove intake air pipe locking clip.
Figure 20
Working at throttle body, using a flathead screwdriver, remove intake air pipe locking clip. (green arrow)
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Disconnect boost pipe from connection at radiator support, then gently wiggle pipe off throttle body.
Figure 21
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. ALL E90 Models
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Loosen three 13mm power steering pump pulley fasteners.
Figure 22
Loosen three 13mm power steering pump pulley fasteners. (green arrows) Do not remove yet. Loosening them now lets you use belt tension to hold the pulley still while you break them free. Remove drive belt. See our tech article on drive belt replacing. Mark direction of belt rotation before removing if reusing belt. When replacing alternator, you only have to remove alternator drive belt from alternator pulley and move aside, it does not have to be removed from the engine. Place an oil drain pan under left side of engine.
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Remove pressure hose 22mm fastener (green arrow), then remove pressure hose from power steering pump.
Figure 23
Remove pressure hose 22mm fastener (green arrow), then remove pressure hose from power steering pump. Allow fluid to drain into container.
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Remove hose clamp by cutting with diagonal pliers.
Figure 24
Remove hose clamp by cutting with diagonal pliers. (red arrow) Then remove hose and allow to drain into drain pan. Then remove A/C hose mounting bracket T45 fastener (yellow arrow) and power steering bracket E12 fasteners (green arrows).
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Remove two E12 fasteners at front of power steering pump.
Figure 25
Remove two E12 fasteners at front of power steering pump. (green arrows)
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Then remove power steering pump from below engine if alternator is installed, or from above if alternator is removed.
Figure 26
Then remove power steering pump from below engine if alternator is installed, or from above if alternator is removed.
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To separate the power steering pump from its mounting brackets, remove two T40 fasteners at rear bracket, then remove bracket.
Figure 27
To separate the power steering pump from its mounting brackets, remove two T40 fasteners at rear bracket, then remove bracket. (green arrows).
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To separate the power steering pump from its mounting brackets, remove three 13mm pulley mounting fasteners (yellow arrows), remove three T40 fasteners at front bracket, then remove bracket.
Figure 28
To separate the power steering pump from its mounting brackets, remove three 13mm pulley mounting fasteners (yellow arrows), remove three T40 fasteners at front bracket, then remove bracket. (green arrows). When installing, slowly tighten ALL fasteners until front of power steering pump is flush with mounting bracket and rear power steering bracket is flush with engine. Once both are flush, tighten. The rest of the installation instructions are reverse of removing. Bleed power steering system once complete. Remember, you have to replace ALL of the power steering pump mounting fasteners that are made out of aluminum, check with a magnet to be sure. Bleeding power steering pump: Before starting engine, fill power steering reservoir with clean fluid to MAX level on dipstick. Start engine and turn steering wheel fully left and right 3 times. Turn engine off, check fluid level, add fluid until it reaches MAX on dipstick. When full, fluid should be clear and foam free. Foam or bubbles is a sign of air in the system.
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Need to buy parts for this project?
Click here to order parts for your BMW from our parts catalog
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  Applies to: 325i (2006-13), 330i (2006-13), 330xi (2006-13), 328i (2006-13), 335i (2006-13)
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