Why is the Vauxhall Astra's engine making a knocking sound?

I have noticed that my Vauxhall Astra's engine is making a strange knocking sound. It seems to be getting louder and more frequent. What could be causing this and is it something I should be worried about?

This could be a sign of an issue with your engine's bearings. It is important to get this checked as soon as possible, as it could lead to more serious damage if left untreated.

Another potential cause could be low oil levels. Make sure to check your oil regularly and top it up if needed. If the knocking sound persists, it is best to have a mechanic take a look.

It could also be a problem with your spark plugs. If they are worn out or dirty, they may not be firing properly and causing the knocking sound. Consider having them replaced.