Mercedes-Benz 400E Power Steering Pump Replacement Costs

Car	Service	Estimate	Shop/Dealer Price
1993 Mercedes-Benz 400EV8-4.2L	Service typePower Steering Pump Replacement	Estimate$2712.02	Shop/Dealer Price$3198.57 - $4574.59
1992 Mercedes-Benz 400EV8-4.2L	Service typePower Steering Pump Replacement	Estimate$2658.86	Shop/Dealer Price$3127.17 - $4489.51

Car

Service

Estimate

Shop/Dealer Price

1993 Mercedes-Benz 400EV8-4.2L

Service typePower Steering Pump Replacement

Estimate$2712.02

Shop/Dealer Price$3198.57 - $4574.59

1992 Mercedes-Benz 400EV8-4.2L

Service typePower Steering Pump Replacement

Estimate$2658.86

Shop/Dealer Price$3127.17 - $4489.51

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.

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.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee

Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(34)

Rating Summary

SEE REVIEWS NEAR ME

Ryan

6 years of experience

61 reviews

Request Ryan

by michael

Mercedes-Benz 400E V8-4.2L - Power Steering Pump - Phoenix, Arizona

ryan was good but you service was nasty ,and i will never used you all again. I was a good customer and i spend money with you for over 3 years and i never thought i would get that kind of service..

23 years of experience

85 reviews

by Richard

Mercedes-Benz 400E V8-4.2L - Oil Pressure Sensor - Huntersville, North Carolina

Very upfront

Joseph

21 years of experience

21 reviews

Request Joseph

by Jessie

Mercedes-Benz ML320 V6-3.2L - Power Steering Pump - San Jose, California

Excellent mechanic. He completed the car service in timely manner. Rate:10

Andrew

12 years of experience

962 reviews

Request Andrew

by Ureka

Mercedes-Benz ML500 V8-5.0L - Power Steering Pump - Shawnee Mission, Kansas

Great experience! Very knowledgeable and professional. highly recommend this service and mechanic.

Mercedes-Benz 400E Power Steering Pump Replacement at your home or office.

Estimate price near me

Power Steering Pump Replacement Service

How much does a Power Steering Pump Replacement cost?

On average, the cost for a Mercedes-Benz 400E Power Steering Pump Replacement is $1725 with $899 for parts and $826 for labor. Prices may vary depending on your location.

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

When to consider replacing the power steering pump:

How do mechanics replace the power steering pump?

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

When replacing the power steering pump keep in mind:

Meet some of our expert Mercedes-Benz mechanics

Excellent Rating

Rating Summary

Ryan

Ryan

Joseph

Andrew

Excellent Rating

Rating Summary

Recent articles & questions

Gasket or main seal leaking oil.

P0480 trouble code

I’m getting fuel to the carb, why is my [engine](/topics-engine-ford/) not staying running?

How can we help?