Why does the Audi A4 make a buzzing noise when I start the engine? How can I fix it?

I recently noticed that my Audi A4 makes a buzzing noise when I start the engine. It only lasts for a few seconds but it's concerning. Is this something I should be worried about and how can I fix it?

The buzzing noise you're hearing is most likely due to a faulty starter motor. It's a common issue with the Audi A4 and can easily be fixed by replacing the starter motor.

I had the same issue with my Audi A4 and it turned out to be a loose battery connection. Check to make sure all your battery connections are tight and secure.