Mercury Montego Windshield Washer Pump Guide: 2003-2007
If your windshield washers have stopped working, this guide will help you diagnose and replace the pump on your Mercury Montego.
- A failed washer pump on a Montego is typically due to normal age and wear; no specific recalls exist for this part.
- Replacement is a straightforward DIY task that requires moving the coolant reservoir for access.
- An aftermarket pump from a reputable brand like Trico offers a reliable and cost-effective repair.
- The most common symptoms are no spray at all or a weak spray, even when the fluid reservoir is full.
Symptoms of a Failing Windshield Washer Pump
When the washer pump in your Montego starts to fail, the signs are usually straightforward. Before assuming the pump is bad, always check two things first: make sure the washer fluid reservoir is full and check the fuse for the washer system. If both are fine, you likely have a bad pump. Common symptoms include:
- Silent Operation: You press the washer button, and nothing happens. If you don't hear a humming sound from the engine bay, the pump's motor has likely failed or is not receiving power.
- Pump Hums, No Fluid Sprays: If you can hear the pump motor running but no fluid comes out, the problem could be clogged nozzles, blocked hoses, or a broken internal part of the pump.
- Weak or Uneven Spray: A dying pump may lose its ability to create enough pressure, resulting in a weak stream that doesn't effectively clean the windshield.
- Leaking Fluid: Finding blue, green, or orange puddles of washer fluid under the front of your car can indicate a cracked pump housing or a deteriorated rubber grommet where the pump seals to the reservoir.
Known Issues for the 2005-2007 Mercury Montego
The windshield washer system on the Mercury Montego and its sibling, the Ford Five Hundred, is generally reliable. Searches for official recalls or Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) did not find any specific issues related to the washer pump for these models. Most failures are the result of normal wear and tear over many years of use.
Choosing the Right Aftermarket Pump
For a vehicle like the 2005-2007 Montego, a new aftermarket windshield washer pump is the most practical and cost-effective choice. The original OEM part offers no significant advantage in this case, and a used part is not recommended due to its unknown history.
Aftermarket brands like Trico produce replacement parts that are designed to meet or exceed original equipment performance. These pumps are engineered for a direct fit, making installation straightforward without needing any modifications. For a simple, non-mechanical part like a washer pump, a quality aftermarket option provides reliable performance at a good value.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Trico) | $27.43 |
| New OEM | $40 - $55 |
| Shop Labor | $98 - $143 |
DIY Replacement Overview
Replacing the windshield washer pump on a Montego is a job most DIYers can handle. The pump is located on the washer fluid reservoir, but it is tucked away. You will need to move the coolant reservoir to the side to gain access. The entire job should take less than an hour.
- Locate the Pump: Open the hood and find the washer fluid reservoir filler neck. The reservoir itself is low in the engine bay. The pump is pushed into the bottom of this tank.
- Gain Access: Use an 8mm socket to remove the bolts holding the coolant reservoir. Carefully move it aside to create space to work. You do not need to disconnect its hoses.
- Remove the Old Pump: Place a drain pan underneath, as the reservoir will empty. Disconnect the electrical wire and the fluid hose from the old pump. Then, simply pull the old pump straight out of the rubber grommet on the reservoir.
- Install the New Pump: Push the new pump firmly into the grommet. Reconnect the electrical plug and the fluid hose.
- Finish Up: Reposition the coolant reservoir and secure it. Refill the washer fluid reservoir with new fluid and test the system to ensure it sprays correctly.
Frequently Asked Questions
Is it safe to drive with a broken windshield washer pump?
You can drive your vehicle, but it is a safety risk. In bad weather or if your windshield becomes dirty from road grime or insects, you will not be able to clean it. This can severely limit your visibility. It is recommended to replace the pump as soon as possible.
My Montego has only one washer fluid reservoir. Does it use one or two pumps?
The Mercury Montego does not have a rear wiper and therefore only uses one windshield washer pump for the front windshield. This simplifies ordering, as you do not need to worry about a front or rear specific pump.
I hear the pump motor but no fluid comes out. Is the pump definitely bad?
Not necessarily. First, check that the reservoir is full. Then, check the washer nozzles on the hood for clogs. You can use a small pin or needle to clear them. If the nozzles are clear and the tank is full, the pump's internal impeller may have broken, which means you will need a new pump.
What tools do I need to replace the pump?
For the Mercury Montego, the main tool you will need is an 8mm socket or wrench to move the coolant reservoir. You may also want a pair of pliers for the hose clamp and a flathead screwdriver to help disconnect the electrical clip. A drain pan is also essential to catch the old fluid.
Technical Specifications
OEM Part Numbers: 6F9Z-17664-A 7L2Z-17664-A F75Z17664BA
The Mercury Montego uses a single washer pump for the front windshield. It is a 12V electric pump that press-fits into a grommet on the washer fluid reservoir.
We Have This Part in Stock
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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