🔧 Flex - Cabin Air Filter Replacement

Replacing the cabin air filter helps your A/C and heater breathe easier and keeps dust, pollen, and odors out of the cabin. On your Flex, the filter sits behind the glove box, so this is a quick interior job with no lifting required.

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

Assumption: Your Flex uses the common behind-glovebox filter access.

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⚠️ Safety & Precautions

• ⚠️ Turn the ignition off and remove the key before working around the dash.
• ⚠️ Don’t force plastic panels; they can crack in cold weather.
• ⚠️ Battery disconnect is not required for this service.

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🔧 Required Tools

You'll need the following tools for this repair:

• Trim removal tool set
• Flashlight
• Nitrile gloves
• Safety glasses

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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 on level ground and set the parking brake.
• Move the front passenger seat back to give yourself room.
• Empty the glove box so nothing falls out when it drops down.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open and “drop” the glove box

• Open the glove box fully.
• Use your hands to gently push the glove box sides inward (this clears the built-in stops).
• Let the glove box swing downward toward the floor.
• Tip: Go slow to avoid bending the hinges.

Step 2: Locate the cabin filter access door

• Use a flashlight to look behind the glove box opening.
• Find the rectangular filter cover/door on the HVAC case (the big black plastic box).

Step 3: Remove the filter cover

• Use your fingers or a trim removal tool set to release the cover tabs.
• Pull the cover straight off and set it aside.
• Tip: Pry lightly—tabs break if twisted.

Step 4: Remove the old cabin air filter

• Wear nitrile gloves and pull the filter straight out.
• If it’s tight, wiggle gently—do not crush the plastic housing.
• Note the airflow direction arrow on the old filter (you’ll match this on the new one).

Step 5: Install the new cabin air filter

• Check the “Air Flow” arrow on the new filter.
• Slide the new filter in the same direction as the old one came out, keeping it square so it doesn’t fold.
• Make sure it seats fully (no corner sticking out).

Step 6: Reinstall the cover and glove box

• Reinstall the filter cover and press until the tabs click.
• Lift the glove box back up, then push the sides inward again to get past the stops.
• Close the glove box and confirm it opens/closes smoothly.

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✅ After Repair

• Start the engine and run the blower on medium and high to confirm normal airflow.
• Listen for whistling—if you hear it, the filter may not be seated flat.
• If your filter is charcoal/odor type, expect reduced smells after a few minutes of airflow.

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💰 DIY vs Shop Cost

Shop Cost: $80-$160 (parts + labor)

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

You Save: $65-$115 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.3-0.6 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.