What are the most common reasons for an Audi 80's engine misfiring?

I have noticed that my Audi 80's engine has been misfiring lately. I have checked the spark plugs and replaced them, but the issue still persists. Can anyone suggest other potential causes for engine misfiring in an Audi 80?

Aside from spark plugs, another common cause of engine misfiring in Audi 80s is a faulty ignition coil. It's best to have this checked and replaced if necessary.

A clogged or dirty fuel injector can also cause engine misfiring in Audi 80s. Make sure to clean or replace them regularly to avoid this issue.

In some cases, a faulty oxygen sensor can also lead to engine misfiring. If you have noticed a decrease in fuel efficiency, it may be worth checking the oxygen sensor.