🔧 Prius - Cabin Air Filter Replacement

Your cabin air filter cleans the air that comes through your A/C and heater vents. Replacing it helps reduce musty smells, improves airflow, and keeps dust and pollen out of the cabin.

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

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⚠️ Safety & Precautions

• ⚠️ Park on level ground and shift to P.
• ⚠️ Make sure the car is fully OFF (READY light off) before working under the dash.
• ⚠️ Do not force plastic tabs; they can crack in cold weather.
• ⚠️ Battery disconnect is not required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Plastic trim tool set
• Flashlight

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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 Prius on a flat surface, shift to P, and turn the car completely OFF.
• Move the front passenger seat back to give yourself room to work.
• Have a trash bag ready—the old filter is usually dusty.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the glove box and clear space

• Open the glove box fully and remove any items inside.
• Use a flashlight to look along the right side of the glove box for a small “damper” arm (a small strut that slows the glove box). It looks like a tiny shock.

Step 2: Disconnect the glove box damper

• Use a plastic trim tool set to gently pop the damper arm off its pin on the glove box (pry lightly at the clip area).
• Set the damper arm aside; don’t bend it.

Step 3: Drop the glove box down

• With the glove box open, press inward on both sides of the glove box (near the upper edges) to clear the side stops.
• Let the glove box swing downward toward the floor.

Step 4: Remove the cabin filter door

• Behind the dropped glove box, find the cabin filter housing (rectangular cover).
• Use a plastic trim tool set (or your fingers) to release the tabs and remove the filter access door.

Step 5: Pull out the old filter

• Slide the filter tray/filter straight out of the housing by hand (use nitrile gloves).
• Note the airflow direction marking (often an arrow). Take a quick photo for reference.

Step 6: Install the new cabin air filter

• Install the new cabin air filter in the same orientation as the old one.
• Make sure the airflow arrow matches the housing direction marking (if shown).
• Slide the filter/tray back in smoothly—do not crush or fold the filter.

Step 7: Reassemble the glove box

• Reinstall the filter access door by hand until the tabs click in.
• Lift the glove box back up and press the sides inward again to pass the stops back into place.
• Reconnect the damper arm onto its pin using your hand; use the plastic trim tool set only if needed to guide it gently.

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✅ After Repair

• Start the car and turn the fan to medium/high to confirm airflow feels normal and there are no rattles.
• Sniff test: musty odors often improve right away, but may take a few drives to fully clear.
• If airflow is weak, recheck that the filter isn’t installed backward or jammed.

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💰 DIY vs Shop Cost

Shop Cost: $70-$150 (parts + labor)

DIY Cost: $15-$40 (parts only)

You Save: $55-$110 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.