Infiniti QX30 Replace Spark Plugs and Engine Air Filter

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To the left there is another, smaller-diameter hose. This hose has a permanent hose clamp. If you grab the hose and firmly pull outward, it will release.

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There are two vacuum hoses routed above the air intake tube. Remove them from the clips mounted into the air intake tube.

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At the bottom of the air intake tube, next to the turbocharger, there is another vacuum hose. Remove it from the clip.

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Grab the air intake tube near the turbocharger and gently pull it to the left. It should release off of the turbocharger inlet.

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Pull the air intake tube to the left and then rotate it up and towards the back of the engine bay so the small curved piece points upward. Then rotate on the transvere axis so the long pipe points up towards the hood, and then to the passenger side of the vehicle. While making this maneuver you can free the pipe from underneath the vaccum hoses and electrical harness that ran above the air intake tube.

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We now have access to the ignition coils.

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Use a Torx T-30 socket and appropriate ratchet or t-handle to remove the ignition coil bolts. I strongly suggest working one ignition coil at a time, rather than trying to remove all of them at the same time.

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The ignition coil should pull up and towards the front of the engine bay.

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Once removed, the ignition coil can be placed on the top of the engine, and you should be able to see the spark plug.

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Use a 14mm spark plug socket and appropriate ratchet with extension or t-handle to remove the spark plug.