Why is my Vauxhall Insignia's engine making a knocking sound?

I have recently noticed that my Vauxhall Insignia's engine is making a loud knocking sound, especially when I accelerate. What could be causing this issue and how can I fix it?

It is possible that your engine's spark plugs may need to be replaced. This can cause a knocking sound if they are old or worn out. I would recommend taking your car to a mechanic to have them checked.

Another possible cause could be low engine oil levels. Check your oil level and if it is low, top it up with the recommended oil for your Vauxhall Insignia.

It is also important to regularly change your engine oil to prevent issues like this. If it has been a while since your last oil change, it may be time to get it done.

If the knocking sound persists, it is best to have a mechanic take a look at your engine as it could be a sign of a larger problem.