Why is the Ford Focus' engine making strange noises?

I recently bought a Ford Focus and I've noticed that the engine is making some weird noises. It only happens when the car is idling or when I first turn it on. Is this something I should be concerned about?

It is possible that there is an issue with the engine or one of its components. I suggest taking your car to a mechanic or dealership to have it checked out.

It could be a simple fix, such as a loose belt or a dirty air filter. I would recommend getting it looked at just to be safe.