2014–2019 Toyota Highlander
Save $135 by doing it yourself! Shop cost: $180
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| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Spark plugs (correct heat range) | — | $35.00 | |
| Dielectric grease | — | $6.00 |
About prices: shown prices are estimates from typical Amazon listings and change frequently, and cheaper alternatives may be available. Confirm the current price on Amazon before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Park the 2015-2024 Toyota Highlander on level ground and wait until the engine is cool to the touch. Confirm the correct plug type and heat range for your engine. Informational DIY — EZ Car Fix is not a shop.
On the 2015-2024 Toyota Highlander, remove any engine cover. Disconnect each coil electrical connector, remove the coil hold-down bolt, and pull the coil straight up. Label coils by cylinder so they go back in the same place.
Use a spark plug socket and extension to back out the old plug on the Toyota Highlander. Inspect the tip for oil, ash, or unusual wear. Blow out the well before installing the new plug if debris is present.
Verify gap against the Toyota Highlander manual. Thread the new plug in by hand first to avoid cross-threading, then torque to ~13 ft-lbs / 18 Nm (confirm in your vehicle manual). A light coat of dielectric grease on the coil boot helps sealing.
Refit each coil on the 2015-2024 Toyota Highlander, tighten the hold-down bolt, and reconnect the connector. Repeat for remaining cylinders. Start the engine and confirm a smooth idle with no misfire codes.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
2008–2013
2014–2019
2008–2013
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2014–2019