A Home Mechanic's Guide to the 2005-2007 Mercury Montego Power Steering Pump
That whining noise when you turn your Montego's steering wheel is the most common sign of a failing power steering pump.
- Your Montego requires MERCON V automatic transmission fluid, not standard power steering fluid.
- A whining noise when turning is the number one symptom of a failing pump.
- Always replace the power steering reservoir with the pump to avoid contaminating the new part.
- After replacement, you must bleed the air from the system to prevent noise and damage.
Is Your Montego's Power Steering Pump Failing?
A failing power steering pump on a 2005-2007 Mercury Montego will give you clear warning signs. The most common symptom is a whining or groaning noise that changes with engine speed and gets louder when you turn the steering wheel. You might also notice that the steering feels stiff or heavy, requiring more effort to turn. Check under the front of your car for puddles of reddish or light amber fluid, which indicates a leak from the pump or its hoses.
Check for Leaks First
While there are no major recalls for the power steering pump itself, some Montego and Ford Five Hundred models had issues with leaking power steering hoses. A leaking hose can starve the pump of fluid, causing it to whine and eventually fail. Before replacing the pump, carefully inspect all power steering lines for wetness or grime buildup.
Choosing the Right Aftermarket Pump
When shopping for a new aftermarket power steering pump, you'll find a range of quality and price. For the Montego, which shares its pump with the Ford Five Hundred and Freestyle, brands like AAE, BBB Industries, and Cardone are available.
- Premium Aftermarket (e.g., AAE - Atlantic Automotive Enterprise): Brands like AAE often position themselves as a higher-quality alternative, sometimes re-engineering parts to exceed original specifications. They focus on using new components and may offer better reliability and a longer lifespan, making them a good choice if you plan to keep your car for a long time.
- Standard Aftermarket (e.g., Cardone New, BBB Industries): These brands offer a more budget-friendly option. However, owner reviews for their remanufactured lines are often mixed, with some reporting early failures or defects out of the box. When choosing these brands, opting for their "New" parts line over "Remanufactured" may provide better quality, as they are built with 100% new components.
Always Replace the Reservoir
The power steering fluid reservoir on the Montego contains a non-serviceable internal filter. Over time, this filter gets clogged with debris. If you install a new pump but keep the old reservoir, these contaminants can immediately flow into your new pump and cause it to fail. To protect your investment, always replace the reservoir or purchase a new pump that comes with a reservoir already attached.
Power Steering Pump Replacement Cost for 2005-2007 Mercury Montego
The total cost depends on whether you do the work yourself or hire a professional mechanic. Labor costs at a shop are typically estimated to be between $207 and $304.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Pump | $94 - $287 |
| New OEM (Motorcraft) Pump | $300 - $400+ |
| Shop Labor | $207 - $304 |
| Total Professional Installation | $405 - $502 |
Frequently Asked Questions
What kind of power steering fluid does the Mercury Montego use?
The 2005-2007 Mercury Montego does not use regular power steering fluid. It requires MERCON or MERCON V automatic transmission fluid (ATF). Using the wrong fluid can damage the seals in the steering system and lead to pump failure. Always check your owner's manual to confirm.
Why is my new power steering pump still whining?
If a new pump is making noise, the most likely cause is air trapped in the system. The system must be properly bled by turning the steering wheel from lock to lock several times with the engine running to force the air out. 🎬 Watch: How to properly bleed your power steering system The noise can also be caused by a clogged reservoir filter if the reservoir wasn't replaced with the pump.
Is replacing the power steering pump a DIY job?
For a mechanic with some experience, this is a manageable DIY job that takes about 2-3 hours. It involves removing the serpentine belt, draining the fluid, disconnecting hoses, and unbolting the pump. 🎬 See this step-by-step pump replacement walkthrough However, accessing the bolts can be tight, and you will need a pulley puller/installer tool if your new pump doesn't come with a pulley.
What is a "core charge"?
Many aftermarket pumps, especially remanufactured ones, have a core charge. This is a refundable deposit you pay when you buy the part. You get the deposit back when you return your old, failed pump to the store. This allows the manufacturer to rebuild it.
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Technical Specifications
OEM Part Numbers: 5F933A696AA 6F933A696AA 6F933A696AB 6F9Z3A696C 5F9Z3A674AA
The power steering pump for the 2005-2007 Mercury Montego is a belt-driven hydraulic pump compatible with the 3.0L V6 engine. It is shared with the Ford Five Hundred and Ford Freestyle models of the same years.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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