What are the most common issues with the Vauxhall Insignia's engine?

I have a Vauxhall Insignia and I noticed that the engine is not running smoothly. What are some common problems that I should look out for?

The Vauxhall Insignia has been known to have issues with its timing chain and VVT actuator. It is important to regularly check and replace these parts to avoid potential engine damage.

Another common issue is with the ignition coils, which can cause misfires and poor engine performance. It is recommended to replace all the ignition coils at once to prevent further issues.

Make sure to also check the PCV valve and hoses for any clogs or damage. These can cause vacuum leaks and affect engine performance.