What is the most common cause of engine misfire in a Vauxhall Astra?

I have a Vauxhall Astra and it's been experiencing engine misfires. I've replaced the spark plugs and ignition coils, but the problem still persists. What could be causing this issue?

It's possible that the fuel injectors are clogged or malfunctioning. I would recommend having them checked and potentially cleaned or replaced.

Another common cause of engine misfires in Vauxhall Astra is a faulty mass air flow sensor. I would suggest having it tested and replaced if necessary.

Make sure to check the condition of the air filter. A dirty air filter can restrict air flow and cause engine misfires.