Why does my Kia Rio have a rough idle?

My Kia Rio has an excessive vibration at idle. What could be causing this issue?

A rough idle can be caused by many factors including dirty fuel injectors, spark plugs, or air filters. It's important to regularly maintain your Kia Rio to avoid these issues.

Another possible cause of a rough idle is a faulty idle air control valve. I recommend getting this checked and replaced if necessary.

It's also possible that there is an issue with the engine itself, such as a misfiring cylinder. I suggest taking your Kia Rio to a mechanic for a diagnostic test.