Why is my Vauxhall Astra making a strange noise while idling?

I recently noticed that my Vauxhall Astra is making a strange noise while idling at a stop light or in traffic. It sounds like a loud grinding or knocking noise. What could be causing this and what should I do?

It's possible that your engine is in need of a tune-up or that your oil needs to be changed. Try taking your car in for a routine maintenance check and see if that resolves the issue.

Another possible cause could be a loose or damaged belt. Have a mechanic inspect your belts and replace them if necessary.

If the noise is coming from the exhaust, it could be a sign of a leak or other issue. It's best to have a professional check and repair any exhaust issues.