Is it normal for my Ford Mondeo's engine to make a knocking noise?

I recently purchased a used Ford Mondeo and I've noticed that the engine makes a knocking noise at idle. Is this something I should be concerned about? How can I fix it?

It is not normal for any car's engine to make a knocking noise, including the Ford Mondeo. It could be a sign of a bigger issue and I recommend taking it to a mechanic as soon as possible to get it checked.

I also have a Ford Mondeo and I've experienced this issue before. It turned out to be a problem with the spark plugs. I suggest getting them replaced and see if that fixes the knocking noise.

I've owned a few Ford cars and the Mondeo is known for its engine noise. As long as the noise is not excessively loud and the car is running smoothly, it's most likely nothing to worry about. But if you're still concerned, it's always best to get a professional opinion.