How to Change Ignition Coils on Kia Hyundai engine

DIY Cost: $20-$130
Est. Time: 1 hr
Difficulty: Easy
This guide provides instructions on how to replace the ignition coils on Hyundai and Kia Theta II engines.

This guideline applies to popular models such as Kia Optima, Sorento, Sonata, Tucson, Santa Fee, etc.; see the complete list below.

What you will need

The tools needed to completely replace the ignition coils Kia / Hyundai include:


Let the engine cool down

How to change kia hyundai ignition coils

Make sure the engine has cooled down. We would recommend disconnecting the negative terminal from the battery. Rember to never touch ignition coils or spark plug wires when the engine is running. Ignition coils generate a high voltage that can be hazardous and even cause death.

Remove the engine cover.

diy hyundai ignition coil replacement santa fe elantra sonata guide

The cover pulls right up. It is held in place with four tabs, pins and there are no screws that you need to worry about.

Identify the ignition coil.

how to install replace engine ignition coil hyundai sonata kia optima

Locate the faulty ignition coil. Cylinders are numbered from one to four, one starting on the passenger side, and cylinder four is on the driver's door. If you had a P0301 misfire code, that means that cylinder one plug or ignition coil ONE is defective. If you had a P0302 misfire code, that means that cylinder TWO plug or ignition coil is defective and so on.

Before you remove the spark plug wires, we recommend that you label the wires so that you will be able to connect the wires to the correct ignition coil. Remove the plug wires by squeezing on the lock tabs and pulling up on them until they come off of the coil, as shown in the video. Move the wires off to either side of the coil to get them out of the way.

Remove ignition coil

how to change ignition coil on hyundai kia theta ii engine

The ignition coil is held on with one 10mm bolt. Remove the bolt using the 10 mm sockets and ratchet. You can now pull the coil up and remove it out of the vehicle.

Install the new ignition coil.

Carefully place the new ignition coil in, making sure it is seated properly on top of the spark plug. Secure it with the bolt using the socket and ratchet. Press the spark plug wires into the ignition coil until you hear it click/lock.

If you are replacing all of the coils, make the ignition coil connectors go back into the same coils as before, which means don't change the order of the electrical connectors.


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

(G4KA, G4KD, G4KF, G4KH)

Image by: Dennis Brown

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)


  • Torque Specifications: 3.9 ~ 5.9N.m (0.4 ~ 0.6kgf.m, 2.9 ~ 4.3lb-ft)
  • It is recommended to use safety glasses and gloves while replacing the ignition coils.
  • Make sure your engine has cooled down, or you risk getting burned by hot engine parts.
  • The engine should be off when you replace the ignition coils.

More specifically, this guide is for any vehicle equipped with Kia / Hyundai Theta II engine. Replacing the ignition coil on your Hyundai / Kia 4 cylinder engine is very easy.

A four-cylinder Kia / Hyundai engine is very popular and is used in many other models. Click on the show applicable models tab to see which models use this specific engine. The engine cover may look different, but the procedures for replacing the ignition coils are still the same.

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How to Change Ignition Coils on Kia Hyundai engine What you will need The tools needed to completely replace the ignition coils Kia / Hyundai include: