🔧 Altima - Engine Air Filter Replacement

Replacing the engine air filter on your Altima is a simple maintenance job that helps the engine breathe properly. A dirty filter can reduce performance, fuel economy, and airflow into the engine.

Difficulty Level: Beginner | Estimated Time: 10-15 minutes

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⚠️ Safety & Precautions

• ⚠️ Let the engine cool before working near the air intake box.
• ⚠️ Keep dirt, leaves, and tools out of the open air filter housing.
• ⚠️ Do not start the engine while the air filter 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

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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 engine off and let it cool for a few minutes.
• 💡 Open the hood and support it securely with the hood prop rod.
• 🧼 Put on safety glasses and nitrile gloves.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the Engine Air Filter Box

• Open the hood and look on the driver-side/front area of the engine bay for the black plastic air filter housing.
• The air filter housing is the box connected to the large black intake tube going toward the engine.
• Use a clean microfiber towel to wipe loose dirt from the top of the housing before opening it.
• Keep dirt out of the intake.

Step 2: Release the Air Filter Housing Clips

• Use your hands to release the metal spring clips on the air filter housing.
• A spring clip is a small metal latch that holds the plastic cover closed.
• Pull each clip outward until it pops free from the housing cover.
• No bolts need to be removed for normal filter replacement.

Step 3: Open the Air Filter Housing

• Use both hands to lift the air filter housing cover slightly.
• Do not force the cover upward too far because the intake tube remains attached.
• Move the cover just enough to slide the old engine air filter out.
• Gentle movement prevents cracking plastic tabs.

Step 4: Remove the Old Engine Air Filter

• Use your hands to pull the old engine air filter straight out of the housing.
• Notice the filter’s orientation before removing it so the new one goes in the same way.
• Check the old filter for heavy dirt, leaves, oil, or rodent debris.

Step 5: Clean the Air Filter Box

• Use a shop vacuum to remove leaves, dust, and debris from the lower air filter housing.
• Use a clean microfiber towel to wipe the sealing edge where the filter sits.
• Do not push dirt toward the open intake tube.
• A clean seal prevents unfiltered air leaks.

Step 6: Install the New Engine Air Filter

• Use your hands to place the new engine air filter into the lower housing.
• Make sure the rubber sealing edge sits flat all the way around.
• The filter must not be bent, pinched, or sitting crooked.
• There are no torque specs for this step because the housing is clipped, not bolted.

Step 7: Close and Secure the Air Filter Housing

• Use both hands to lower the air filter housing cover back into place.
• Make sure the cover tabs are seated correctly in the lower housing.
• Use your hands to snap the metal spring clips back onto the cover.
• Confirm the housing is fully closed with no visible gaps around the filter.

Step 8: Final Check

• Use a clean microfiber towel to remove any remaining dust around the air box.
• Make sure no tools, towels, or packaging are left in the engine bay.
• Close the hood securely.

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✅ After Repair

• ✅ Start the engine and let it idle for 30 seconds.
• 👂 Listen for unusual hissing near the air filter box, which may mean the cover is not seated correctly.
• 🔍 If you hear a leak, turn the engine off and recheck the filter position and housing clips.
• 📅 Replace the engine air filter at the maintenance interval, or sooner if driving in dusty conditions.

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💰 DIY vs Shop Cost

Shop Cost: $60-$120 parts + labor

DIY Cost: $15-$35 parts only

You Save: $45-$85 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.2-0.3 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.