How to troubleshoot my Audi A4 engine misfire?

My Audi A4 has been experiencing a noticeable engine misfire at idle and when accelerating. It's been going on for a few weeks now and I'm not sure what the issue could be. I've checked the spark plugs and ignition coils, but they seem fine. Any suggestions on what to do next?

Have you checked the fuel injectors? If they are clogged or malfunctioning, it could cause a misfire. You can try running a fuel system cleaner through your engine, or visit a mechanic to have them professionally cleaned or replaced.

Another possibility could be a faulty oxygen sensor. This sensor measures the amount of oxygen in the exhaust and can affect the engine's performance if it's not working properly. Try replacing it or having it tested at a mechanic.