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BMW 645Ci Power Steering Pump Replacement at your home or office.

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Power Steering Pump Replacement Service

How much does a Power Steering Pump Replacement cost?

On average, the cost for a BMW 645Ci Power Steering Pump Replacement is $3297 with $2401 for parts and $896 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2005 BMW 645CiV8-4.4LService typePower Steering Pump ReplacementEstimate$5793.04Shop/Dealer Price$7033.62 - $10664.64
2004 BMW 645CiV8-4.4LService typePower Steering Pump ReplacementEstimate$5735.38Shop/Dealer Price$6956.17 - $10572.35
Show example BMW 645Ci Power Steering Pump Replacement prices

What is the power steering pump and how does it work?

The power steering pump is a belt-driven or electric-driven hydraulic pump that generates the hydraulic pressure needed to provide power steering assist. It develops output pressures of 1,000 PSI or more. The pump output is directed to the steering gear, often a rack and pinion type unit, where the hydraulic pressure pushes on the steering rack, greatly reducing the effort it would otherwise take to turn the steering wheel.

Power Steering

When to consider replacing the power steering pump:

  • Groaning or whining noise when turning. Noise can occur if there is wear on the pump bearings or impeller vanes. A low fluid level or trapped air can also cause noises. If the pump has already been operating while dry, adding fluid may not resolve the noise and replacement of the pump might be necessary.
  • Power steering fluid leaks. Leaks can develop at pump seals, threaded connections, hoses, or on the steering rack and pinion unit. Pump seal leaks will generally require a replacement.
  • Difficult steering. Should you notice it is harder to turn the steering wheel, it might mean the power steering pump output pressure is too low, or there could be blockages in the pump or lines.
  • Damage to the pump pulley. Should the pump pulley become damaged or is loose on the pump shaft, you might detect vibration, drive belt damage, or hard steering. Either the pulley will have to be serviced or the pump assembly replaced.

How do mechanics replace the power steering pump?

  • If driven by a drive belt, the power steering pump is bolted to the engine via a bracket that allows for adjustment of the pump drive belt. Once the engine is cold, and safe to work on, the drive belt is removed.
  • If driven by an electric pump, the pump may be mounted in conjunction with the steering shaft or in conjunction with the steering rack. With either a drive belt or electric pump, removal of any dash, panel, or steering components is performed to access the pump.
  • The threaded connectors to the pump inlet and outlet are loosened and removed.
  • Any mounting bolts and brackets are removed so the pump can be removed.
  • If the old pump has failed catastrophically, or there is reason to suspect contaminants in the power steering hoses, the system is flushed.
  • The new pump is bolted on, the pressure and return hoses attached and the system is bled of all air. If pump is belt-driven, it is tightened to the manufacturer’s specification.
  • Finally, the engine is run and the car is road tested to confirm normal steering effort. If a new drive belt was installed, belt tension is measured again, and adjusted as needed, after the belt has run for a few minutes.

Is it safe to drive with a power steering pump problem?

No. If the power steering pump is operated without an adequate amount of fluid, and the pump reservoir will not hold fluid due to a large leak. The pump could seize, which would snap the serpentine belt and likely leave you stranded. If the pump turns and there is adequate fluid, but there is no power assist, it will require much greater effort to turn the steering wheel, and that presents inherent safety risks. Generally, the wisest course is to seek immediate repairs if you suspect a problem with any component in your car’s power steering system.

When replacing the power steering pump keep in mind:

  • Any belts driving the pump should be inspected and replaced as needed. The pump will only produce the required hydraulic pressure if it is driven by the belt at an adequate speed.
  • Power steering leaks from aged rubber hoses, particularly where the rubber is crimped to the steel tube, are not unusual and should be carefully inspected. The system operates under high pressure. The fluid is flammable, and if leaking fluid happens to contact a hot engine part, a fire might result. You always want to be sure the hoses and connections are sound.

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Real customer reviews from BMW owners like you.

Excellent Rating

(26)
Rating Summary
22
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22
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1

Pete

17 years of experience
192 reviews
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Pete
17 years of experience
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by Richard
BMW 645Ci V8-4.4L - Check Engine Light is on - Bonita, California
Pete was here on time, very knowledgeable of my BMW, and made me feel comfortable and confident that he would make the repairs correctly. I also was very impressed with his honesty, and he exceeded my expectations. I am very pleased and will call on him (you) next time. I will definitely recommend his service to friends.

Tien

24 years of experience
903 reviews
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Tien
24 years of experience
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by Duke
BMW 645Ci V8-4.4L - Car Thermostat Replacement - Oakland, California
Very professional, friendly, fair and knowledgeable regarding the repair. I strongly recommend his for any future repair work I would consider.

John

33 years of experience
1126 reviews
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John
33 years of experience
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by ANDREW
BMW 645Ci V8-4.4L - Oil Change - Hitchcock, Texas
Was a bit concerned about having a oil change on my BMW at my home. John was fantastic, wasn't a spot of oil anywhere to be found. Great job and very professional. Recommend this service to all.

Luis

5 years of experience
302 reviews
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Luis
5 years of experience
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by Grant
BMW 645Ci V8-4.4L - Water Pump - Richmond, Virginia
Luis is very knowledgeable on BMWs and repaired my water pump and thermostat a few weeks ago; issue still seems resolved thanks to his expertise! Highly recommended!!

Excellent Rating

(26)
Rating Summary
22
1
2
0
1
22
1
2
0
1
Number of BMW 645Ci services completed
286+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

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