2015–2021 Lexus NX

2015-2021 Lexus NX - Cabin Air Filter Replacement

By Tom Becker ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026

🔧 Easy 15-25 minutes $20 DIY

Save $65 by doing it yourself! Shop cost: $85

Quick answer: Cabin Air Filter Replacement on a 2015–2021 Lexus NX is rated Easy and takes about 15-25 minutes. You'll need 1 tool for this job, and parts cost about $20. This guide walks you through the full job step by step, including the mistakes to avoid.

Quick Video Tutorial

Parts You Need

Total Cost

$20.00

Part Name	Part Number	Price	Buy
Cabin air filter	—	$20.00	Amazon

About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.

💡 Pro tip: Order all parts at once to save on shipping

Step-by-Step Instructions

Follow these steps carefully

Prepare the NX and confirm the filter application

Park on level ground, set the parking brake, ignition fully off, and slide the passenger seat back. The filter sits behind the glovebox — confirm your replacement is cataloged for the 2015–2021 NX (NX200t, NX300, NX300h) before starting.

Empty and lower the glovebox

Empty the glovebox, squeeze both walls inward past the stop bumpers, and let it swing down. Unhook the right-side damper arm from its pin first — it pulls straight off its ball stud; don't let the box hang by it.

🔧 Mechanic's note — Ray Delgado

In my experience, That damper arm ball stud gets brittle with age — if it snaps, the glovebox slams open every time. Pull straight, never pry sideways.

Open the filter cover and remove the old filter

Release the filter cover's tabs or screws (varies by trim) and pull it straight off. Slide the old filter out level so dust doesn't spill into the blower, noting its arrow direction. Vacuum debris from the empty slot.

Install the new cabin filter

Slide the new filter in with arrows matching the original, pushed fully home and lying flat — no bent frame or folded pleats, or unfiltered air bypasses the edges. Check the windshield cowl intake for leaves while you're there.

Reassemble and verify HVAC airflow

Refit the filter cover, lift the glovebox past its stop bumpers, and reattach the damper arm. Start on fresh air and cycle through fan speeds — confirm strong, quiet airflow with no rattling from the filter area.

All Done!

Test your repair before closing everything up. If something doesn't work right, double-check your steps.

⚠️ Common Mistakes to Avoid

• Installing the filter backwards (ignore the airflow arrow)
• Forcing a thicker filter so the door will not latch
• Tearing glovebox stops, dampener arms, or filter-door clips
• Leaving leaves and debris in the housing so they blow into the cabin

Tools You'll Need

Trim tool or flat screwdriver (optional) Flashlight Gloves Vacuum or rag for debris

⚠️ Safety First!

• Informational DIY. EZ Car Fix is not a shop.
• Bag the old filter — it can shed dust, leaves, and debris into the cabin.
• Do not force clips or the glovebox dampener; plastic tabs break easily.
• If a musty smell returns within a week, it may be a drain clog or evaporator issue — not just the filter.