Genuine Hyundai Spark Plugs

What Is a Hyundai Spark Plug?

A Hyundai spark plug ignites the air‑fuel mixture inside your engine’s cylinders, creating the controlled combustion that produces power. Each plug must deliver a precise spark at the right moment. Genuine Hyundai spark plugs are engineered for your specific engine, ensuring correct heat range, thread length, electrode design, and reliable ignition performance.

How Often Should Spark Plugs Be Replaced?

Replacement intervals vary by plug type and model:

• Copper/Nickel: every 30,000–40,000 km
• Platinum: every 60,000–80,000 km
• Iridium (most modern Hyundai models): every 90,000–160,000 km or 6–8 years

Always follow your Hyundai owner’s manual or service schedule. It is also recommended to get your spark plug checked regularly.

Signs of Worn or Failing Spark Plugs

Watch for these common symptoms:

• Hard starts or longer crank time
• Rough idle or engine vibration at standstill
• Sluggish acceleration and reduced power
• Worse fuel economy
• Check Engine Light (often misfire codes like P0300–P0304)
• Engine misfire or hesitation under load

Replacing worn spark plugs can noticeably improve engine performance, drivability, and fuel efficiency while reducing emissions. It is highly recommended to use genuine spark plugs when replacement. Genuine Hyundai spark plugs deliver the consistency and longevity your engine was designed for.

How to Change Hyundai Spark Plugs

We suggest having spark plugs replaced at an authorised Hyundai Service Centre to ensure correct torque, gap (where applicable), and coil handling. If you’re confident with DIY, the job is doable with care.

On most Hyundai petrol engines, spark plugs sit at the top of the engine, threaded into the cylinder head, directly under the ignition coils (coil‑on‑plug). Below are the basic steps to change spark plugs.

1. Cool the engine completely. Disconnect the negative battery terminal for safety.
2. Remove engine cover (if fitted).
3. Clean around each coil area so debris doesn’t fall into the cylinders.
4. Unplug ignition coil connectors and remove coils (note their positions).
5. Insert the spark plug socket and loosen each plug carefully. If you feel binding, back off and try again—avoid stripping threads.
6. Check and confirm plug gap only if applicable. Many genuine iridium plugs are pre‑gapped—do not alter unless specified.
7. Hand‑thread the new plug first to avoid cross‑threading.
8. Torque to spec (varies by engine/plug; commonly around 14–25 Nm—always check your Hyundai specification).
9. Apply a small dab of dielectric grease inside each coil boot (optional), reinstall coils, and reconnect the plugs.
10. Refit the engine cover, reconnect the battery, and start the engine to confirm a smooth idle and no warning lights.

Tip: Replace all plugs as a complete set. If coils or boots look cracked or oil‑soaked, consider replacing them too and address any rocker cover gasket leaks.

Explore Our Range of Genuine Hyundai Spark Plugs

At Jefferson Hyundai Parts, we stock genuine Hyundai spark plugs for all Hyundai models and year ranges, including i30, i20, Accent, Elantra, Staria, iLoad, iMax and more.

If you can’t find the exact spark plug for your Hyundai on our online store, just reach out via webchat. Our parts specialists will quickly help you identify and source the correct genuine spark plugs.