Why is my Audi's engine making a strange buzzing noise?

I've noticed that my Audi's engine is making a buzzing noise that wasn't there before. What could be causing this and what should I do about it?

It's possible that one of the belts or pulleys in your engine may be worn or loose, causing the buzzing noise. It's important to get this checked out by a certified mechanic to prevent further damage to your engine.

Another potential cause could be a problem with the exhaust system. If there is a leak or blockage, it could create a buzzing noise. Take your car to a trusted mechanic to have them inspect the exhaust system.

In some cases, the buzzing noise could be coming from a faulty fuel pump. If the fuel pump is starting to fail, it may make a buzzing sound when your car is running. Have a mechanic check the fuel pump and replace if necessary.