🔧 Altima - Engine Air Filter Replacement

Your Altima’s engine air filter sits in the air box and keeps dust/debris out of the engine. Replacing it restores proper airflow, helps performance, and can improve fuel economy if the old filter is clogged.

Difficulty Level: Beginner | Estimated Time: 10-20 minutes

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⚠️ Safety & Precautions

• ⚠️ Work with the engine off and cool to avoid burns.
• ⚠️ Keep fingers/tools clear of belts and fans.
• ⚠️ Do not run the engine with the air filter removed.
• ⚠️ Battery disconnect is not required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• Phillips screwdriver
• Clean shop towel
• Nitrile gloves
• Safety glasses

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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 and set the parking brake.
• Open the hood and let the engine cool for a few minutes.
• Locate the air box (black plastic box) connected to the intake tube going to the engine.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the air box

• Find the air box cover near the front/side of the engine bay.
• Release the metal clips by hand if equipped; if your cover uses screws, loosen them with a Phillips screwdriver.
• Lift the air box lid up enough to remove the filter. Don’t yank on attached hoses.

Step 2: Remove the old air filter

• Pull the filter straight out by hand.
• Note how it sits in the air box (the rubber edge should seal all the way around).

Step 3: Clean the air box sealing surface

• Use a clean shop towel to wipe out loose dirt inside the lower air box.
• Do not drop dirt into the intake tube opening. Wipe gently; don’t push debris inward.

Step 4: Install the new air filter

• Set the new filter into the lower air box by hand.
• Make sure the filter is fully seated and the perimeter seal is flat and even all the way around.

Step 5: Close and secure the air box

• Lower the air box lid back into place by hand.
• Re-latch the clips by hand, or tighten the screws with a Phillips screwdriver (snug, not over-tight).
• Do a quick visual check that the lid is not pinching the filter and all clips/screws are fully secured.

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✅ After Repair

• Start the engine and let it idle for 15–30 seconds.
• Listen for air leaks (a loud hissing/whistling can mean the air box isn’t sealed).
• If you hear a leak, shut the engine off and re-check the filter seating and clips/screws.

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💰 DIY vs Shop Cost

Shop Cost: $40-$100 (parts + labor)

DIY Cost: $15-$35 (parts only)

You Save: $25-$65 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.2-0.4 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.