Home › Scion tC › Spark plugs

tC · Power

tC Spark plugs Install Guide

Your tC

Pick your year to see what fits.

This page covers the US tC.

+0–3 whp (est.)
Easy$20–$4030 min
All tC mods

Why do it

Fresh plugs bring back lost power.

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. Pull the old plugs

    • Remove the coils and unscrew the plugs.
    Watch this step (EverythingAvron, on a 2005-2010 tC) (1:32–3:04)

  2. Fit the new plugs

    • Thread them in and torque them.
    Watch this step (3:04–4:36)

  3. Finish up

    • Refit the coils and bolts.
    Watch this step (4:36–5:22)

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.

Spark Plug install guides for other cars

More tC mods