How to change spark plugs Hyundai Kia Four Cylinder Engine

In this tutorial, you will learn how to change spark plugs on Hyundai four-cylinder  2.0T & 2.4 L engine.

This is also known as the Theta II engine and is used in many models such as Hyundai Sonata, Genesis, ix35, Santa Fe, Tucson. 

What you will need

  1. Hyundai OEM Spark Plugs
  2. Spark Plug Socket
  3. 3/8 Extension 
  4. Ratchet


Prepare area

Clean the area around near the spark plugs and around the ignition coils. Remove any dirt near the spark plugs in order to avoid it from falling into the cylinders latter. 

Remove ignition coil

Use a 10 mm socket to loosen the bolt that secures the coil in place. The Theta II Kia/Hyundai engine uses coil-on-plug design.

Unplug the ignition coil connector by pressing the locking tab and then pulling the connector away. Once the bolt and connector have been removed pull the ignition coil up.

If the ignition coil refuses to come up try twisting it slightly then try lifting it up and out. 

Remove spark plug

Blow dirt away from the spark plug recess before you remove the spark plugs. Use a 16-mm spark plug removal tool, ratchet and a 3/8" extension to remove the spark plugs from the engine.

Rotate counterclockwise to remove the spark plugs. You may need to use a magnet tool to pull out the spark plug. 

Install new spark plug

It is time to install the new spark plug. It is a good idea to check or at least inspect the gap using a spark plug gapping tool.

Certain spark plugs may come pre-gapped while certain plugs should not be gapped. It is recommended to use an anti-seize lubricant on the spark plug threads.

Install the new spark plugs by hand and then tighten using your ratchet. Do not overtighten the spark plugs or you may strip the threads. If you have a torque wrench handy tighten to spec. Check out the torque specs below. 

To change spark plugs Hyundai 4-cylinder engine you will need one to two hours. Replacing the spark plugs yourself can save you money. 

Torque Specifications

  • Ignition Coil Bolts: 3.9 ~ 5.9N.m (0.4 ~ 0.6kgf.m, 2.9 ~ 4.3lb-ft)
  • Spark Plugs: 11- 15 lb-ft (Verify by calling your dealer)

We hope that you would this guide on how to change spark plugs Hyundai Kia engine useful. Please use the comments section to provide feedback or just leave a comment. 

Hyundai Spark Plugs Replacement Cost

Replacing spark plugs on the Hyundai vehicles listed here will cost you in average less than $30 assuming you already have the tools. If a mechanic at your local repair shop changes your spark plugs expect to pay between $150 to $250.  

Theta/Theta-II Engine - 2.0L (1998cc)

(G4KA, G4KD, G4KF, G4KH,)

2011 Hyundai Sonata Limited 2.0T, turbo GDI engine

  • Hyundai Genesis Coupe Port Injected 2.0 Turbocharged (2010-)
  • Hyundai Sonata GDI 2.0 Turbocharged (2011-)
  • Kia Rondo (2007-)
  • Kia Forte 2.0 (2009-2013)
  • Kia Optima GDI 2.0 Turbocharged (2011-)
  • Kia Sportage GDI 2.0 Turbocharged (2011-)
  • Kia Sorento GDI 2.0 Turbocharged (2016-)
  • Hyundai ix35 MPI 2.0 (2010-)
  • Hyundai Santa Fe (Sport Models) GDI 2.0 Turbocharged (2013-)

Theta/Theta-II Engine - 2.4L 

(G4KC, G4KE, G4KG, G4KJ,)

  • Hyundai Sonata (2006?2010)
  • Hyundai Sonata GDI (2011-)
  • Hyundai Sonata (2011-) (Middle East)
  • Hyundai Tucson (2010-)
  • Hyundai Santa Fe (2010-)
  • Kia Optima (2006?2010)
  • Kia Optima GDI (2011-)
  • Kia Rondo (2007-)
  • Kia Cadenza GDI (2011-)
  • Kia Sportage (2011-)
  • Kia Sorento (2011-)
  • Kia Forte (2010-2013)


Matt, 2016-12-20

I was quoted just over $200 to change spark plugs Hyundai Sonata. I thought I would give it a try after watching this tutorial. The video clip helped a lot. The only diffiuclt part was disconnecting the plugs from the coil.

Thanks so much...keep up the great work. Matt C.

Elliott S. , 2016-12-22

I was thinking of taking it in but now that I know how easy it is to change the plugs yourself I will just save $200.

Hirochimuh , 2018-05-11

This was a good tutorial but if you call something easy and that anyone can do it but then proceed to walk through the tutorial calling for loosening, removing etc., specific parts might I suggest including pictures of the parts you are talking about as the only people who could legitimately follow these instructions are people who wouldn’t need them in the first place.

Jay M., 2018-05-19

Good point. There is a video added to this guide now that should help you follow through.

By YOUCANIC on Aug 26, 2019


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