2009–2016 Audi A4

2009-2016 Audi A4 - Cabin Air Filter Replacement

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

🔧 Easy 15-25 minutes $20 DIY

Save $80 by doing it yourself! Shop cost: $100

Quick answer: Cabin Air Filter Replacement on a 2009–2016 Audi A4 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

Prep and slide the seat rearward

Park the A4 level, ignition off, and open the passenger door. Slide the seat back, pull up the floor mat, and lay down a towel.

Expose the filter door

Look up under the glovebox: a foam under-dash panel is held by three plastic screw-clips. Remove them by hand and lower the panel, noting its orientation. Keep the clips together so none roll away.

Remove the old filter and clean

Slide the old filter down and out, noting its orientation — the replacement goes in with the slanted corner in the upper right. Bag the dirty filter, then wipe the empty housing so debris doesn't fall onto the blower wheel.

Install the new filter

Slide the new filter up with the slanted corner in the upper right, matching the old position. Push it fully home so it sits flat, then slide the white housing door left until it locks.

Reassemble and verify airflow

Press the foam panel flat and confirm all three clips are snug — a loose panel rattles against the dash over bumps. Replace the floor mat and close the passenger door.

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.