How do I fix a rattling noise coming from my Ford Focus engine?

I've noticed a rattling noise every time I start my Ford Focus. It usually goes away after a few seconds, but it's been getting louder lately. What could be causing this and how can I fix it?

It's possible that the rattling noise is coming from loose components in the engine. I would recommend taking your car to a trusted mechanic to have them inspect and tighten any loose parts.

Another possibility is that the noise is coming from the exhaust system. The easiest fix would be to check if any of the exhaust components are loose or have rusted. If so, they may need to be replaced.

If the rattling only occurs when you start your car, it could be a problem with the starter motor. This could be a sign that it needs to be replaced, so I would suggest taking your car to a mechanic for further diagnosis.