🔧 Altima - Engine Air Filter Replacement

Replacing the engine air filter on your Altima helps the turbocharged engine breathe clean air and protects the mass air flow sensor and turbo inlet from dirt. This is a simple maintenance job: you’ll open the air filter housing, swap the filter, and make sure the cover seals correctly.

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

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⚠️ Safety & Precautions

• ⚠️ Let the engine cool before working near the air box and turbo intake parts.
• ⚠️ Keep loose clothing, fingers, and tools away from the radiator fan area.
• ⚠️ Do not start the engine while the air filter or air box cover is removed.
• ⚠️ Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Shop vacuum
• Clean microfiber towel
• Flat-blade screwdriver

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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 your Altima on level ground and shift to Park.
• Set the parking brake.
• Turn the ignition fully OFF and remove the key fob from the vehicle area.
• Open the hood and support it securely.
• The air filter housing is the black plastic box connected to the large intake tube near the engine bay.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the Air Filter Housing

• Put on safety glasses and nitrile gloves.
• Find the black plastic air filter housing in the engine bay.
• Look for the large plastic intake tube attached to it. This tube carries filtered air toward the engine.
• Tip: Take a photo before opening anything.

Step 2: Release the Housing Cover

• Use your hand to release the metal spring clips on the air filter housing cover.
• If a clip is tight, use a flat-blade screwdriver gently to help pop it loose.
• A spring clip is a small metal latch that holds the plastic cover closed.
• Do not pry hard on the plastic housing. It can crack.

Step 3: Open the Air Box

• Lift the air filter housing cover just enough to access the filter.
• Use both hands so you do not stress the intake tube.
• Do not disconnect the mass air flow sensor unless absolutely necessary.
• The mass air flow sensor measures incoming air for the engine computer.

Step 4: Remove the Old Engine Air Filter

• Pull the old engine air filter straight out by hand.
• Notice the direction and shape of the old filter before removing it fully.
• Use a clean microfiber towel to wipe loose dust from the housing edges.
• If there are leaves or debris inside the lower air box, use a shop vacuum to remove them.
• Do not push dirt into the intake tube.

Step 5: Install the New Engine Air Filter

• Install the new engine air filter by hand into the same position as the old one.
• Make sure the rubber sealing edge sits flat all the way around.
• The seal is the soft outer edge that prevents unfiltered air from entering the engine.
• Tip: If it feels forced, stop and realign it.

Step 6: Close and Secure the Housing

• Lower the air filter housing cover by hand.
• Make sure no part of the filter seal is pinched outside the housing.
• Snap the metal spring clips back into place by hand.
• If needed, use a flat-blade screwdriver gently to guide a stubborn clip.
• No torque spec applies because the housing uses spring clips instead of bolts.

Step 7: Final Visual Check

• Use a clean microfiber towel to wipe the top of the air box if dusty.
• Check that the intake tube is still fully seated and not twisted.
• Check that all clips are locked and the air box cover is even on all sides.

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✅ After Repair

• Start the engine and let it idle for about 30 seconds.
• Listen for hissing or whistling near the air box, which can mean the cover is not sealed.
• If the engine runs rough, turn it off and recheck that the filter is seated flat and the housing clips are locked.
• No scan tool reset is required for a normal engine air filter replacement.

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💰 DIY vs Shop Cost

Shop Cost: $60-$120 (parts + labor)

DIY Cost: $20-$45 (parts only)

You Save: $40-$75 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.