Where the cabin air filter sits and what it does

The cabin air filter in your 2017 Ford Explorer is located behind the glove box on the passenger side. It catches dust, pollen, mold spores, and exhaust particles before they enter the air you breathe inside the vehicle. Over time—usually every 12,000 to 15,000 miles, or once a year if you drive in dusty conditions—the filter clogs and your heating and air conditioning system has to work harder to push air through it.

A clogged cabin filter does three things: it reduces airflow from your vents, it makes your climate control system less efficient (which costs you fuel economy), and it lets more contaminants into the cabin because the filter can no longer trap them effectively. Replacing it is one of the cheapest preventive maintenance tasks you can do, and you can do it yourself in about 15 minutes without tools.

Key Takeaways

  • The cabin air filter is behind the glove box on the passenger side and should be replaced every 12,000 to 15,000 miles or annually in dusty climates.
  • You need only the replacement filter itself—no tools, no special equipment—to complete the job in your driveway.
  • The filter slides out of a plastic housing and the new one slides in the same way, with the arrow on the frame pointing toward the cabin.
  • A clogged filter reduces airflow and forces your climate control system to work harder, which lowers fuel economy and comfort.

What filter to buy for your 2017 Explorer

Ford's original part number for the cabin air filter is FR-1685. This is the filter Ford installed at the factory and the one listed in your owner's manual. You can order it from any Ford dealership parts department, or you can buy an aftermarket equivalent from an auto parts store—Motorcraft (Ford's parts brand), Fram, Mann-Filter, and Bosch all make cabin filters that fit the 2017 Explorer and cost between $15 and $35 depending on the brand.

The filter itself is a pleated paper element about 8 inches wide and 6 inches tall, enclosed in a plastic frame. When you order or buy, confirm the part number matches your vehicle year and that the filter is listed as "cabin air" rather than "engine air"—they are different filters in different locations.

How to remove the old filter

Open the passenger-side door and locate the glove box. You do not need to remove the glove box entirely. Push the glove box inward from both sides until it unlatches, then lower it gently so it hangs open below the dashboard. Behind it, you will see a plastic housing with a cover that clips on.

Pinch or press the clips on either side of the housing cover and slide it out toward you. The old filter will be visible inside the housing, usually gray or tan and visibly dusty. Slide the filter straight out toward you—it comes out easily with no resistance. Do not force it; if it sticks, make sure you are pulling straight and not at an angle.

Installing the new filter

Before you slide the new filter in, look at the plastic frame around the filter element. You will see an arrow printed on the frame. This arrow must point toward the cabin (downward and toward the interior of the vehicle), not toward the outside air intake. This direction matters because the filter is designed to work only one way.

Slide the new filter into the housing with the arrow pointing the correct direction. It should slide in smoothly and sit flush in the housing. Once it is seated, slide the plastic cover back into place and press the clips until they snap. Close the glove box by pushing it up until it latches, and you are finished.

When to replace it and what to watch for

Check your cabin filter every 12 months or every 12,000 miles, whichever comes first. If you drive frequently on unpaved roads, in heavy traffic, or in areas with high pollen counts, check it every 6 months. A filter that looks dark gray or brown and feels stiff is ready to be replaced. A filter that still looks light tan or white and feels flexible can usually go longer.

If your air conditioning or heating suddenly feels weak, or if you notice a musty smell from the vents even though the system is running, the cabin filter is likely clogged. Replacing it will restore airflow and often eliminates odors caused by moisture trapped in the old filter. A musty smell is often the first sign that moisture and mold are building up inside the housing, which means the filter can no longer do its job.

Cost and time comparison

Replacing the cabin filter yourself takes 15 minutes and costs $15 to $35 for the filter. A Ford dealership will charge you $40 to $80 in labor plus the cost of the filter, bringing the total to $60 to $110. An independent shop typically charges $30 to $60 in labor plus the filter.

Because the job requires no special tools and no mechanical knowledge, doing it yourself saves money and teaches you how your climate control system is protected. Many owners find that once they have done it once, they are comfortable doing it again at the next interval.

Frequently Asked Questions

Can I drive with a clogged cabin air filter?

Yes, but your air conditioning and heating will be less effective, and you will notice reduced airflow from the vents. A clogged filter also forces your climate control compressor to work harder, which uses more fuel. It is not a safety emergency, but it reduces comfort and efficiency.

Is the cabin air filter the same as the engine air filter?

No. The cabin air filter cleans air that enters the passenger compartment through the heating and air conditioning system. The engine air filter cleans air that enters the engine for combustion. They are in different locations and have different part numbers. Your 2017 Explorer has both.

What happens if I install the filter backward?

If you install it with the arrow pointing the wrong direction, airflow will be restricted and the filter will not trap particles effectively. The system will feel weak and the filter will clog faster. If you realize this after installation, straightforward remove the cover, flip the filter around, and reinstall it the correct way.

Do I need to replace the housing or just the filter element?

Just the filter element. The plastic housing is reusable and lasts the life of the vehicle. You only buy and install the filter itself, which slides into the housing and is held in place by the cover.

How often should I check the cabin filter if I live in a dusty area?

Check it every 6 months if you live in a desert climate, on unpaved roads, or in an area with frequent dust storms. In normal conditions, annual checks are sufficient. If it looks dark or feels stiff when you inspect it, replace it regardless of mileage.