Why is the engine making a rattling noise?

I recently noticed that my Vauxhall Astra's engine is making a rattling noise. It seems to happen when I accelerate and stops when I decelerate. What could be causing this and is it serious?

The rattling noise could be an indication of a loose or damaged component in your engine. It is important to get it checked by a mechanic as soon as possible to avoid further damage.

It could also be due to a low oil level or dirty oil. Make sure to check your oil and get an oil change if needed.

I suggest taking your car to a trusted mechanic for a thorough inspection. They will be able to diagnose the exact cause of the rattling noise and advise on the best course of action.