How to Replace the Cabin Air Filter on a 2018 Mazda CX-9 (Glove Box Method)
Step-by-step instructions with tools/parts needed, airflow direction tips, and post-install checks for 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023
How to Replace the Cabin Air Filter on a 2018 Mazda CX-9 (Glove Box Method)
Step-by-step instructions with tools/parts needed, airflow direction tips, and post-install checks for 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023
🔧 CX-9 - Cabin Air Filter Replacement
Your CX-9’s cabin air filter cleans the air going into the HVAC system (heat/AC). Replacing it helps reduce odors, improves airflow, and keeps dust/pollen out of the cabin.
Difficulty Level: Beginner | Estimated Time: 0.2-0.5 hours
⚠️ Safety & Precautions
- ⚠️ Turn the ignition OFF and remove the key/fob from the vehicle.
- ⚠️ Don’t force plastic tabs; they can snap in cold weather.
- ⚠️ Battery disconnect is not required for this job.
🔧 Required Tools
You'll need the following tools for this repair:
- Nitrile gloves
- Safety glasses
- Flashlight
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Cabin air filter - Qty: 1
📋 Before You Begin
- 🅿️ Park on level ground and set the parking brake.
- Turn the HVAC system OFF.
- Move the front passenger seat back for more room.
🔨 Step-by-Step Instructions
Follow these steps in order:
Step 1: Open the glove box
- Open the glove box fully and remove any items inside.
- Use flashlight to look at the right-side glove box damper (a small arm that slows the glove box).
Step 2: Disconnect the glove box damper
- Use your hand (or nitrile gloves for grip) to gently pop the damper arm off its pin on the right side.
- Damper = the little arm that prevents slamming.
Step 3: Release the glove box stops
- With the glove box open, gently push in on both sides of the glove box (near the upper edges) to clear the built-in “stops.”
- Once the stops clear, let the glove box swing down toward the floor.
- Use safety glasses to protect your eyes from dust.
Step 4: Remove the cabin filter access cover
- Behind the lowered glove box, find the cabin filter housing cover (a small rectangular door).
- Use your hand to press the side tab(s) and pull the cover off.
- Use flashlight to confirm the cover clips are fully released before pulling.
Step 5: Remove the old cabin air filter
- Slide the old filter straight out of the housing.
- Keep the filter level as you pull it out to avoid dumping leaves/dust.
- Old filter can be very dusty—go slow.
Step 6: Install the new cabin air filter
- Check the airflow direction marking on the filter frame (usually “AIR FLOW” with an arrow).
- Install the new filter in the same orientation as the old one (match the arrow direction shown on the housing/old filter).
- Slide it in straight—don’t bend or crush the pleats.
Step 7: Reinstall the cover and glove box
- Reinstall the filter access cover by lining it up and pressing until it clicks.
- Lift the glove box back up and push the sides in again so the stops pass back into place.
- Reconnect the glove box damper arm on the right side (press it back onto the pin until it snaps on).
✅ After Repair
- Start the vehicle and turn the fan to medium-high to confirm strong airflow.
- Switch between fresh air and recirculation to make sure there are no unusual noises.
- If you smell musty odor, consider running the fan for a few minutes with AC on.
💰 DIY vs Shop Cost
Shop Cost: ₹1,200-₹2,500 (parts + labor)
DIY Cost: ₹600-₹1,500 (parts only)
You Save: ₹600-₹1,000 by doing it yourself!
Shop labor rates vary but typically run ₹800-₹1,500/hour. This repair takes a shop approximately 0.2-0.5 hours.
🎯 Ready to get started?
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