Why is my Audi A4 losing power at high speeds?

I have noticed that my Audi A4 seems to struggle to maintain its speed when I'm driving on the highway. It feels like the engine is not providing enough power. What could be causing this and how can I fix it?

It is possible that your air filter is clogged, which can restrict air flow and decrease engine power. I would recommend checking and potentially replacing your air filter.

Another issue that could be causing this is a faulty oxygen sensor. This sensor helps adjust the air/fuel ratio in your engine and a malfunction can cause power loss. It is recommended to have a professional mechanic diagnose and replace the faulty sensor.