Why does my Ford Galaxy's engine make a knocking noise?

I recently bought a used Ford Galaxy and noticed that the engine makes a knocking noise whenever I accelerate. It doesn't seem to affect the car's performance, but it is concerning. Is this something I should be worried about?

It may be a sign of an engine issue that needs to be addressed. I highly suggest bringing it to a trusted mechanic for a thorough inspection.

This can happen due to a variety of reasons, such as low quality fuel or worn out spark plugs. Have a professional diagnose the issue to be sure.