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How to Replace Spark Plug 02-06 Nissan Altima

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Created on: 2013-11-13

Watch this video to learn how to fix engine misfiring or stumbling. The experts at 1A Auto show how to replace the spark plugs in your 02-06 Nissan Altima.

  1. step 1 :Removing the Spark Plug
    • Remove the four 5mm Allen bolts from the engine cover
    • Pull off the engine cover
    • Disconnect the wiring harness from the ignition coil
    • Remove the 10mm bolt from the ignition coil
    • Pull the ignition coil off
    • Remove the spark plug with a 5/8 inch spark plug socket
    • If the spark plug doesn’t pull out with the socket, retrieve it with pliers or a magnet
  2. step 2 :Preparing the New Spark Plug
    • Determine the correct gap for your vehicle
    • Set the gap on the spark plug to .044 using a spark plug gapping tool
    • The correct setting should slide in and out of the gap with some resistance
  3. step 3 :Installing the New Spark Plug
    • Insert the new spark plug
    • Thread the spark plug by hand
    • Tighten the spark plug to between 18 and 20 foot-pounds
    • Put the ignition coil into place
    • Insert the 10mm bolt into the ignition coil
    • Repeat these steps for the remaining spark plugs
    • Put the engine cover into place
    • Install the four 5mm Allen bolts into the engine cover

Tools needed

  • 5mm Hex Wrench

    Socket Extensions

    Spark Plug Gapping Tool

    5/8 Inch Spark Plug Socket

    10mm Socket


    Magnet - Extendable

    Needle nose pliers

Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Don from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace the spark plug on this 2003 Nissan Altima with the 2.5 liter, 4-cylinder engine. The items you'll need for this are new spark plugs from 1AAuto.com, 10mm socket and ratchet, 5mm Allen bit, and a 5/8 inch spark plug socket, as well as a gap tool.

To access the ignition coils, you first have to remove this engine cover. It's held in by these four 5mm Allen bolts. We'll just fast forward as Don removes these. Now, the cover just lifts right off. Here are your four ignition coils. It's held in with one 10mm bolt and the harness right here. Just push the tab and pull that harness off, and then remove that 10mm bolt. The ignition coil just lifts right up and out. With the ignition coil removed, you can see the spark plug right down in there. Using an extension and your 5/8 inch socket, you want to just remove that spark plug. If the plug doesn't come right out, then you can use a magnet or pliers to reach down and grab it.

You'll want to set the gap between the center electrode and the ground electrode. On this, it should be .044. Set it by sliding the spark plug tool in between there and make sure there's a little resistance when you pull it in and out.

Carefully, put the spark plug back down in and thread it in by hand to make sure you don't cross-thread it. Once it's seated, you want to tighten it between 18 and 20 foot pounds. Now, put your coil back down in and replace the 10mm bolt. You'll want to reconnect it and repeat these steps for the rest of the spark plugs.

We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

2002 - 2006  Nissan  Altima
2002 - 2006  Nissan  Sentra
2000 - 2001  Nissan  Sentra
2009 - 2012  Suzuki  Equator
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