2010–2015 Hyundai Tucson
By Ray Delgado ✓ Certified Mechanic · Published Sep 24, 2026 · Updated Oct 14, 2026
Save $288 by doing it yourself! Shop cost: $344
Quick answer: Spark Plug Replacement on a 2010–2015 Hyundai Tucson is rated Moderate and takes about 45–90 minutes. You'll need 5 tools for this job, and parts cost about $56. 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 of the correct type for the 2010 Hyundai Tucson (check owner's manual) | — | $56.00 |
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
Work on a completely cold engine so the aluminum cylinder head threads are protected during plug removal. Disconnect the negative battery terminal before disturbing any ignition components. Completion looks like a cold engine with the battery disconnected.
Remove the plastic engine cover to reveal the ignition coils across the top of the engine. Unplug each coil's electrical connector and remove the hold-down bolts, keeping the coils in cylinder order.
Clear debris from around the plug wells so nothing falls into the cylinders, then loosen each old plug with a spark plug socket and extension. Lift the plugs out with the socket's rubber insert and inspect them for fouling or wear.
Confirm the new plugs are the correct type for the 2010 Tucson, as specified in the owner's manual, and check the electrode gap against the specification. Thread each plug in by hand with the extension alone to avoid cross-threading, then snug with a ratchet to the manufacturer's specification. Completion looks like four new plugs seated with no forcing.
I learned this one the hard way — I thread each Tucson plug in with the extension alone, then snug to spec — I've cross-threaded one rushing with the ratchet.
Seat each ignition coil fully over its plug, reinstall the hold-down bolts, and reconnect every electrical connector until the locking tabs click. Refit the engine cover onto its grommets and reconnect the negative battery terminal.
Start the Tucson and let it idle, confirming the idle is smooth with no check-engine light. The job is complete when the engine runs smoothly under all conditions with no warning lights.
My shop habit: I verify the repair by running the engine under all conditions — smooth idle, no warning lights, no leaks. That's my sign-off.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
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