🔧 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 fuel economy, throttle response, and overall performance.

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 loose clothing, hair, and tools away from the engine bay.
• ⚠️ 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
• Clean shop towel
• 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 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 on the driver-side front area of the engine bay, connected to the large black air intake tube.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the Hood

• Use your hand to pull the interior hood release lever near the driver-side lower dash.
• Use your hand to move the safety latch under the front edge of the hood.
• Raise the hood and secure it with the hood prop rod if needed.
• Good lighting prevents mistakes.

Step 2: Locate the Air Filter Housing

• Use a flashlight to find the black plastic air filter box on the driver side of the engine bay.
• The air filter housing is the plastic box attached to the large ribbed intake hose.
• The housing uses spring clips instead of bolts on this Altima.

Step 3: Release the Air Box Clips

• Use your hand to unclip the metal spring clips on the air filter housing.
• A spring clip is a small metal latch that holds the air box lid closed.
• Do not bend the clips too far; just swing them away from the air box lid.

Step 4: Open the Air Filter Housing

• Use your hand to gently lift the air box lid enough to access the filter.
• Do not pull hard on the intake tube or wiring nearby.
• If the lid feels tight, gently wiggle it by hand while keeping the lower box steady.

Step 5: Remove the Old Air Filter

• Use your hand to pull the old engine air filter straight out of the housing.
• Note the filter direction before removing it completely.
• Use a clean shop towel to wipe loose dirt from the lower air box.
• Do not push dirt into the intake opening.

Step 6: Inspect the Air Box

• Use a flashlight to check inside the lower air box for leaves, sand, or debris.
• Use a clean shop towel to remove loose debris by hand.
• Do not use water inside the air box.
• Keep dirt out of the engine.

Step 7: Install the New Engine Air Filter

• Use your hand to place the new engine air filter into the lower air box.
• Make sure the rubber edge sits flat all the way around.
• The rubber edge is the seal; it keeps unfiltered air from entering the engine.
• Do not force the filter. If it does not sit flat, remove it and reposition it.

Step 8: Close the Air Filter Housing

• Use your hand to lower the air box lid back into position.
• Make sure the lid sits evenly on the filter seal.
• Use your hand to snap the metal spring clips back into place.
• No torque spec applies because the air box uses hand-operated clips.

Step 9: Final Visual Check

• Use a flashlight to inspect the air box seam.
• Make sure there are no gaps around the air box lid.
• Use your hand to confirm the intake hose is still attached and not loose.

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✅ After Repair

• ✅ Start the engine and let it idle for about 30 seconds.
• ✅ Listen for unusual hissing or whistling from the air box area.
• ✅ If the engine runs rough, turn it off and recheck that the filter and lid are seated correctly.
• ✅ No scan tool reset or infotainment reset is required for this repair.

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💰 DIY vs Shop Cost

Shop Cost: $50-$90 parts + labor

DIY Cost: $15-$35 parts only

You Save: $35-$55 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?

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