What causes a rough idle in a Kia Ceed?

My Kia Ceed is experiencing a rough idle and I'm not sure why. Any ideas on what could be causing this issue?

It could be an issue with your spark plugs. Make sure they are clean and functioning properly.

Another possible cause is a dirty air filter. Try replacing it to see if that improves your idle.

Your engine could also be misfiring, which could be caused by a faulty ignition coil. Consider having it checked by a mechanic.