🔧 CX-9 - Cabin Air Filter Replacement

Your cabin air filter cleans the air that comes through the HVAC vents (heat/AC). Replacing it helps airflow, reduces musty smells, and can improve defrost performance.

Difficulty Level: Beginner | Estimated Time: 0.25-0.5 hours

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⚠️ Safety & Precautions

• ⚠️ Turn the ignition OFF and remove the key/fob from the vehicle.
• ⚠️ Don’t force plastic tabs; they can crack in cold weather.
• ⚠️ Keep fingers clear of the glove box hinges while lowering it.
• ⚠️ Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Plastic trim tool set
• Flashlight
• Small flathead screwdriver

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Cabin air filter - Qty: 1

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📋 Before You Begin

• Park your CX-9 on level ground and set the parking brake.
• Open the passenger door for easy access to the glove box.
• Have a trash bag ready for dusty filters.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Empty and open the glove box

• Remove items from the glove box so nothing falls out.
• Use a flashlight to look along the right side of the glove box for the damper arm (a small soft-open strap/arm that slows the glove box).

Step 2: Release the glove box damper

• On the right side, gently pop the damper arm off its pin/clip by hand or with a plastic trim tool set.
• If it’s tight, use a small flathead screwdriver carefully to help pry it off. Push gently—don’t gouge plastic.

Step 3: Lower the glove box fully

• Press the glove box sides inward to clear the built-in stops (the “stops” are the plastic bumps that normally prevent it from dropping all the way).
• Once both stops clear, let the glove box swing down toward the floor.

Step 4: Open the cabin filter access door

• Behind the glove box, locate the rectangular cabin filter cover on the HVAC housing.
• Release the tabs on the cover by hand or with a plastic trim tool set, then remove the cover.

Step 5: Remove the old cabin air filter

• Pull the filter straight out (some dust/leaves may fall).
• Use nitrile gloves and keep the filter level to reduce mess.

Step 6: Install the new cabin air filter

• Look for the airflow arrow printed on the filter frame.
• Install it in the same direction as the old one came out. Arrow direction must match airflow.
• Slide it in straight so the edges don’t fold.

Step 7: Reassemble the glove box

• Reinstall the cabin filter cover by snapping the tabs back in place.
• Lift the glove box up, press the sides inward again, and pass the stops back into position.
• Reconnect the damper arm on the right side by pressing it back onto its pin/clip.

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✅ After Repair

• Start the engine and run the blower fan on medium, then high, to confirm strong airflow and no rattles.
• Switch between fresh air and recirculation to ensure the fan sounds normal.
• If you hear a flutter, recheck filter seating.

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💰 DIY vs Shop Cost

Shop Cost: $70-$140 (parts + labor)

DIY Cost: $15-$45 (parts only)

You Save: $55-$95 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.3-0.5 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.