Why is my Kia Rio's engine making a loud knocking noise?

I recently bought a used Kia Rio and noticed that the engine is making a loud knocking noise. It seems to get louder when I accelerate. Is this something I should be concerned about?

This could be a sign of a serious issue with your engine. It is best to have it checked by a mechanic as soon as possible to avoid any further damage.

It is possible that the knocking noise is caused by low oil levels. Check your oil and top it off if needed. If the noise persists, take it to a mechanic for further inspection.

I had a similar issue with my Kia Rio and it turned out to be a problem with the spark plugs. I would recommend getting them checked and replaced if necessary.