🔧 Altima - Engine Air Filter Replacement

Your A4-cylinder Altima uses an engine air filter to keep dust and debris out of the engine. Replacing it is a quick maintenance job that helps fuel economy, performance, and protects the engine.

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

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⚠️ Safety & Precautions

• ⚠️ Work with the car OFF and the key fob away from the car to prevent an unexpected start.
• ⚠️ Keep fingers, clothing, and tools away from belts and fans.
• ⚠️ Do not touch orange high-voltage wiring; this job does not require any hybrid system service.
• ⚠️ Battery disconnect is not required for this air filter replacement.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Phillips screwdriver
• 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 and shift to Park.
• Turn the car OFF and keep the key fob at least 10 feet away.
• Open the hood and let the engine bay cool for a few minutes if it’s hot.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the air filter box

• Use a flashlight and find the black plastic air box near the front/side of the engine bay, attached to the large intake tube.
• The air filter sits inside this box.

Step 2: Open the air filter box

• Use a Phillips screwdriver to loosen any screws (if equipped).
• Release the metal clips by hand (common on this Altima) and lift the air box lid up.
• Don’t force it—check for missed clips.

Step 3: Remove the old air filter

• Wear nitrile gloves and pull the old filter straight out.
• Use a flashlight to look inside the lower air box for leaves or dirt.

Step 4: Clean the air box seating surface

• Use the flashlight and wipe the rim where the filter seals using a clean, dry cloth (shop towel).
• Make sure no debris will get trapped under the new filter’s seal.

Step 5: Install the new air filter

• Place the new filter into the lower air box in the same orientation as the old one.
• Make sure it sits fully flat all the way around (this prevents unfiltered air leaks).

Step 6: Close and secure the air box

• Lower the lid carefully so it doesn’t pinch the filter.
• Re-latch the clips by hand and use a Phillips screwdriver to snug any screws (if equipped).
• If the lid won’t sit, the filter isn’t seated.

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✅ After Repair

• Start your Altima and let it idle for 30 seconds.
• Listen for hissing/whistling near the air box (can indicate the lid isn’t fully clipped).
• Take a short test drive and confirm normal acceleration.

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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 0.2-0.5 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.