2005-2007 Mercury Montego Door Lock Actuator and Latch Guide
If your Montego's doors won't lock or make a buzzing sound, the actuator is the likely cause.
- A buzzing or grinding noise from the door when locking is a sure sign the actuator is failing and should be replaced.
- For 2005 models, check if Safety Recall 06S45 for freezing door latches was performed on your vehicle, as this is a critical safety issue.
- Replacing the actuator requires removing the door panel; choosing a quality brand like Motorcraft, Continental, or Standard Ignition can prevent you from having to do the job twice.
- Symptoms like an unresponsive lock or a 'door ajar' light are directly linked to a failing door lock actuator assembly.
Is Your Mercury Montego Door Lock Actuator Failing?
A failing door lock actuator is a common issue as a vehicle ages. The signs are usually easy to spot. If you're experiencing problems with your power locks, it's likely one or more of your actuators need replacement.
Common Failure Symptoms:
- Inconsistent Operation: The lock works sometimes but not others.
- Strange Noises: You hear a buzzing, grinding, or clicking sound from inside the door when you lock or unlock it. This is the sound of the small electric motor inside the actuator struggling or its gears skipping.
- Complete Failure: One or more doors will not respond to the remote key fob or the interior lock switch at all. You have to lock or unlock it manually with the key or by hand.
- Door Ajar Light: In some cases, a faulty actuator assembly can cause the 'door ajar' light to stay on, even when the door is fully closed.
Known Issue: Safety Recall 06S45 for Door Latches
For 2005 Mercury Montego models, Ford issued a safety recall (NHTSA ID: 06V388000, Ford Recall 06S45) for the door latches. The problem was that in wet, freezing weather, the latch might not engage, allowing a door to open while driving. The fix involved dealers installing a kit and lubricating the latches. While this recall targeted the latch mechanism, the actuator is part of this assembly. If you have a 2005 model, it is critical to verify if this recall work was performed on your vehicle.
Choosing the Right Aftermarket Door Lock Actuator
When shopping for a new door lock actuator for your Montego, you'll find several brands. They generally fall into three quality tiers.
- Premium Aftermarket (OEM-Equivalent): Brands like Motorcraft (which is the Ford/Mercury original part) and Continental fall into this category. Continental is a major OEM supplier, and their parts are often identical to the ones installed at the factory. Choosing one of these brands gives you the highest confidence in fit, function, and longevity.
- Quality Aftermarket: Brands such as Standard Ignition (SMP) are well-respected in the industry. They engineer their parts to meet or exceed original equipment specifications and offer a reliable alternative to the premium brands at a slightly lower cost.
- Economy Brands: This tier includes brands like Replacement and Skyward. These are budget-friendly options that can get the job done. However, with economy parts, there can be a higher risk of inconsistent quality or a shorter lifespan compared to premium or quality aftermarket brands.
Pro Tip: Replacing a door lock actuator requires removing the entire inner door panel. Because the labor is the same regardless of the part's cost, many owners and mechanics recommend using a premium or quality aftermarket brand to avoid having to do the job a second time if a cheaper part fails prematurely.
Typical Replacement Costs
The cost to replace a door lock actuator can vary based on your location and whether you do it yourself or use a repair shop.
| Item | Estimated Cost |
|---|---|
| Aftermarket Part | $15 - $95 |
| Shop Labor | $160 - $235 per door |
| Total Shop Visit (1 Door) | $175 - $330 |
Frequently Asked Questions
Can I replace just the small motor inside the actuator?
While some DIY enthusiasts have successfully opened the actuator housing to replace only the small electric motor, it is not a standard repair. It requires careful disassembly and soldering. For a reliable and lasting repair, it is recommended to replace the entire door lock actuator assembly.
Is the door latch recall from Ford still active?
Safety recalls do not expire. If your 2005 Montego was covered under recall 06S45 and the repair was never done, a Ford or Lincoln/Mercury dealer should still perform the service free of charge. You can check your vehicle's VIN on the NHTSA website to see open recalls.
Why does my 'door ajar' light stay on after replacing the actuator?
The door latch assembly contains a switch that signals to the car whether the door is open or closed. Sometimes, lower-quality aftermarket actuators may have switches that don't communicate correctly with the vehicle's computer, causing a persistent 'door ajar' warning. This is another reason why opting for a higher-quality brand can prevent headaches.
Is replacing the door lock actuator a difficult job?
For a DIYer with some experience, it's a manageable task. The main challenge is carefully removing the interior door panel without breaking any clips. After that, the actuator is typically held in with a few bolts and connected by electrical plugs and linkage rods. Watching a tutorial video for a Ford Five Hundred or Mercury Montego is highly recommended before you start.
Technical Specifications
OEM Part Numbers: SW-8718 (Front Left) SW-6954 (Rear Left)
The door lock actuator is an integrated component of the door latch assembly. It is specific to each door (Front Left, Front Right, Rear Left, Rear Right). Ensure you are purchasing the correct actuator for the specific door you need to repair.
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.
- Mercury Montego: