In this tutorial, you will learn how to change the spark plugs and ignition coils on Hyundai four-cylinder engine.
Next, remove the engine cover and disconnect the ignition coils. Unplug the ignition coil connector by pressing the locking tab and then pulling the connector away.
Use a 10 mm socket to loosen the bolt that secures the coil in place. This vehicle uses coil-on-plug design, therefore you will have one coil on each spark plug.
Once the bolt and connector have been removed pull the ignition coils out. If the ignition coil refuses to come up try twisting it slightly then try lifting it up and out.
It is time to install the new spark plug. It is a good practice to inspect the gap using a spark plug gapping tool.
Certain spark plugs may come pre-gapped while others such as copper plugs should be gapped.
The original spark plugs installed on Hyundai Elantra equipped with the four-cylinder engine are NGK or Denso iridium coated spark plugs.
Below we have listed two highly rated spark plugs that will fit Hyundai Elantra.
According to the owner's manual of a 2016 Hyundai Elantra, the spark plugs should be replaced every 105,000 miles or 84 months. Keep in mind that depending on your driving style and conditions the spark plugs may last longer or need to be replaced as early as 60,000 miles. The original spark plugs are iridium coated.
Make sure to install replacement spark plugs with the correct heat range.
The OEM Hyundai spark plugs are NGK or Denso. Which one is installed on your car depends on the market where your Hyundai was sold?
Acceptable gap range: .035-.042
Hyundai 18846-11070 1884611070
The average cost to change the spark plugs at the Hyundai dealer or an auto mechanic is between $180-$300. DIY cost (if you already have the tools) is under $50.