🔧 RDX - Engine Air Filter Replacement

Your A/C and heater have their own cabin filter, but your A4—sorry—your RDX’s engine air filter is the one that helps the engine breathe clean air. Replacing it restores airflow, helps fuel economy, and protects the engine from dust and debris.

Difficulty Level: Beginner | Estimated Time: 0.2-0.5 hours

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⚠️ Safety & Precautions

• ⚠️ Work with the engine off and cool to avoid burns.
• ⚠️ Keep tools, rags, and fingers out of the air intake tube.
• ⚠️ No battery disconnect is required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Flathead screwdriver
• 10mm socket
• 1/4" drive ratchet
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Engine air filter - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Open the hood and let the engine cool for 10–15 minutes if it was running.
• Have a clean rag ready so no dirt falls into the air box.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the air filter box

• Open the hood and use a flashlight to find the large black plastic air box (the box connected to the big intake tube).
• The air box is the filter’s “housing.”

Step 2: Unclip or unbolt the air box lid

• Release the metal/plastic clips by hand; if they’re stubborn, gently help them with a flathead screwdriver.
• If your air box uses bolts instead of clips, remove them with a 10mm socket and 1/4" drive ratchet.
• Don’t pry hard—plastic tabs can snap.

Step 3: Lift the air box lid

• Lift the top cover straight up enough to access the filter.
• Do not yank on the intake tube; just open the lid like a book if it’s hinged.

Step 4: Remove the old air filter

• Pull the filter straight out by hand.
• Use the flashlight to look inside the bottom of the air box.
• If there’s loose dirt or leaves, wipe it out with a slightly damp rag (do not push debris into the intake).

Step 5: Install the new air filter

• Slide the new engine air filter into place with the rubber edge seated evenly all the way around.
• Make sure it sits flat—no corners folded over.
• A bad seal lets dirt bypass the filter.

Step 6: Close and secure the air box

• Close the air box lid and ensure it lines up with the lower half.
• Reattach all clips by hand, or reinstall bolts using a 10mm socket and 1/4" drive ratchet.
• If bolts were removed: snug them down evenly (no published torque typically; do not overtighten).

Step 7: Quick final check

• Confirm no tools or rags are left in the engine bay.
• Visually verify the air box lid is fully closed on all sides.

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✅ After Repair

• Start the engine and let it idle for 20–30 seconds.
• Listen for whistling or hissing (can mean the air box lid isn’t sealed).
• If you hear an air leak, turn the engine off and re-seat the lid and filter.

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💰 DIY vs Shop Cost

Shop Cost: $60-$140 (parts + labor)

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

You Save: $45-$100 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.