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2015–2021 Volkswagen Golf R

2015-2021 Volkswagen Golf R — Spark Plug Replacement

🔧🔧 Moderate 45–75 minutes

Quick Video Tutorial

Parts You Need

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Total Cost
$0.00
Part Name Part Number Price Buy
Iridium spark plugs for EA888 Gen 3 (quantity 4) — —

💡 Pro tip: Order all parts at once to save on shipping

Step-by-Step Instructions

Follow these steps carefully

1

Cool down and expose the coils

Let the engine cool completely. Disconnect the negative battery terminal. Remove the engine cover by pulling it up off its grommets to expose the four ignition coils on top of the valve cover.

2

Disconnect the coil connectors

Press the release tab on each coil connector and unplug it by the plug body, not the wires. The connectors are fragile. Set the harness aside so you have clear access to all four coils.

3

Pull the ignition coils

Using an ignition coil puller, pull each coil straight up with steady pressure. They seal tightly with rubber boots. Place them in order on a clean rag.

4

Clear the plug wells

Blow compressed air into each plug well to clear grit before removing plugs. Work on one cylinder at a time, keeping the others covered. Debris falling into a cylinder can cause serious damage.

5

Remove the old plugs

Remove each plug with a 16mm magnetic spark plug socket. Inspect the old plugs — normal wear shows a tan insulator; oil fouling or heavy deposits point to other problems. Confirm the new plugs are pre-gapped to 0.028 inches.

6

Install and torque new plugs

Thread each new plug in by hand to avoid cross-threading the aluminum head. Once finger-tight, torque to 25 Nm (18 ft-lbs). Do not exceed this — stripped threads require a helicoil repair.

7

Reinstall and verify

Seat each coil firmly onto its plug until it clicks, reconnect all four connectors, refit the engine cover, and reconnect the battery. Start the engine — it should idle smoothly with no check-engine light.

All Done!

Test your repair before closing everything up. If something doesn't work right, double-check your steps.

⚠️ Common Mistakes to Avoid

  • • Using the wrong spark plug — the EA888 Gen 3 requires specific iridium plugs; copper plugs will misfire under boost.
  • • Over-tightening plugs into the aluminum head — 25 Nm max.
  • • Cracking an ignition coil by prying with a screwdriver instead of a coil puller.
  • • Dropping a plug into the bore — always use a magnetic spark plug socket.