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G37 · Power

G37 Spark plugs

Your G37

Pick your year to see what fits.

This page covers the G37 coupe, sedan and convertible.

Restores lost power
Hard$60–$1002–3 hrs
All G37 mods

Why do it

Worn plugs cost power and throttle response.

Tools you'll need

Starting out? See our budget tool list.

Parts to buy

Double-check fitment before buying. We may earn a commission when you buy through these links, at no extra cost to you.

Before you start

  • Work on a cold engine. Do one plug at a time.

Steps

  1. Remove the covers

    • Take off the battery cover and engine cover.
    Watch this step (TRQ, on a 2008-2013 G37) (0:11–1:06)

  2. Remove the airbox

    • Take out the airbox.
    Watch this step (1:06–3:01)

  3. Remove the throttle body

    • Take off the throttle body.
    Watch this step (3:01–5:44)

  4. Swap the plugs

    • Pull each coil and swap the plug.
    Watch this step (5:44–10:12)

  5. Put it back

    • Refit the intake and covers.
    Watch this step (10:12–14:46)

How to know it worked

Did this guide work for you?

Safety first

  • Park on flat ground, set the parking brake and chock the wheels.
  • Never get under a car held up only by a jack. Use jack stands.
  • Let the engine and exhaust cool first.
  • Disconnect the battery before unplugging electrical parts.
  • Wear safety glasses.
  • If something doesn't match your car, stop and ask a shop.

Follow your part's instructions and your service manual's torque specs.