1998–2002 Toyota Corolla
By Ray Delgado ✓ Certified Mechanic · Published Sep 24, 2026 · Updated Oct 14, 2026
Save $334 by doing it yourself! Shop cost: $344
Quick answer: Spark Plug Replacement on a 1998–2002 Toyota Corolla is rated Moderate and takes about 30–45 minutes. You'll need 5 tools for this job, and parts cost about $10. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| 4 spark plugs (correct for 1ZZ-FE, pre-gapped 0.043 in / 1.1 mm) | — | $10.00 | |
| Anti-seize compound (light coat on plug threads, optional) Optional | — | $5.00 |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Make sure the 1.8L 1ZZ-FE is completely cool to protect the aluminum head threads. Remove the plastic engine cover if equipped to expose the four ignition coils on the valve cover.
Video at 0:00
Press the release tab on the coil's electrical connector and pull it straight off. Remove the single 10mm bolt holding the coil, then twist and lift the coil out of its well.
Before removing the plug, blast compressed air or vacuum around the well to clear sand and grit. Any debris left here can fall into the cylinder once the plug comes out.
Fit the 16mm spark plug socket with an extension down the well and turn counterclockwise. Lift the old plug out and inspect its tip — a tan insulator nose indicates healthy combustion.
Verify the new plug's gap is 0.043 inches with a gap gauge, adjusting gently if needed. Thread the plug in by hand several turns to guarantee it is not cross-threaded, then torque to spec with the wrench.
Quick word from someone who's been under there: I thread the plug in by hand several turns — I've guaranteed no cross-threading this way for years.
Push the ignition coil firmly back into the well until it seats on the plug. Refit the 10mm bolt snugly and click the electrical connector back on until its tab locks.
Work through the other three coils and plugs one at a time, keeping each coil with its original cylinder. Doing them one by one prevents mixing up connectors and dropping debris into open holes.
Refit the engine cover and start the Corolla. Listen for a smooth, even idle with no misfire shake, and take a short drive to confirm power delivery feels normal under load.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
1998–2002
1998–2002
2003–2008
2003–2008
2003–2008
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