What could be causing my Vauxhall Astra's engine to idle rough?

I've noticed that my Vauxhall Astra's engine has started to idle rough and I'm not sure what the cause could be. It used to run smoothly, but now it seems like it's struggling. Any ideas on what could be causing this and how I can fix it?

It sounds like there could be a few possible causes for your rough idling issue. Have you checked your spark plugs and wires? They could be worn out and needing replacement, which could cause your engine to struggle at idle.

Another potential cause could be a dirty or clogged air filter. If it's not getting enough clean air, your engine may struggle to run smoothly. Try replacing the air filter and see if that helps.

It's also worth checking your fuel system, specifically the fuel filter and injectors. If they're dirty or clogged, it could be causing your engine to run rough. You may need to clean or replace these components.