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Cooper S Spark plugs Install Guide

Your Cooper S

Pick your year to see what fits.

This page covers the US Cooper S hardtop.

+0–3 whp (est.)
Easy$25–$8530 min
All Cooper S 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.
  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.

Steps

  1. Pull the wires

    • Label the plug wires and pull them off.
    Watch this step (AKJeeper, on an R53 Cooper S) (1:31–2:58)

  2. Swap the first plug

    • Remove the old plug, then thread the new one by hand.
    Watch this step (2:58–5:51)

  3. Do the rest

    • Repeat on the other cylinders.
    Watch this step (6:37–11:54)

  4. Refit the wires

    • Grease the boots and push them on until they click.
    Watch this step (12:35–15:37)

  5. Pull the coil

    • Unplug and lift out the first coil.
    Watch this step (FCP Euro, on an R56) (2:05–3:27)

  6. Swap the plug

    • Fish out the old plug and snug the new one.
    Watch this step (4:08–5:31)

  7. Do the rest

    • Repeat on the other cylinders.
    Watch this step (5:31–6:13)

  8. Get to the coils

    • Pull the engine cover up and off.
    Watch this step (Kies Motorsports, on an F56) (0:40–1:21)

  9. Swap the first plug

    • Lift out the coil and swap the plug, tightening it to 23 Nm.
    Watch this step (1:21–3:23)

  10. Do the rest

    • Repeat on the other cylinders.
    Watch this step (3:23–4:04)

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

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