How do I troubleshoot a rough idle in my Vauxhall Astra?

I've noticed that my Vauxhall Astra has been idling very roughly lately. What could be causing this issue and how can I fix it?

A rough idle can be caused by a number of things, but the most common culprit is usually a dirty or faulty air filter. I would suggest checking and cleaning or replacing your air filter to see if that improves the idle.

Another common cause of a rough idle in Vauxhall Astras is a problem with the ignition system. Make sure all of your spark plugs and wires are in good condition and properly connected. If they are worn or damaged, it may be time to replace them.

Sometimes, a rough idle can be caused by a malfunctioning sensor or control module. I would recommend taking your vehicle to a trusted mechanic who can run diagnostics and pinpoint the exact issue.