How can I reduce the wind noise in my Audi A4?

I noticed that my Audi A4 has quite a bit of wind noise when driving on the highway. Is there anything I can do to reduce it?

First, check your weather stripping around the doors and windows. If they are worn or damaged, they can let in more noise. You can replace them yourself or have a professional do it for you.

Another possible cause is a loose or missing panel under the car. Check underneath and make sure all the panels are securely in place. If one is missing, you can replace it with a new one or try to find a used one from a salvage yard.