Why does my Audi A3's engine make a rattling noise when accelerating at high speeds?

I have noticed a rattling noise coming from my Audi A3's engine when I accelerate at high speeds. It seems to go away when I let off the gas pedal. What could be causing this and is it something I should be concerned about?

It sounds like your Audi A3 may have a loose heat shield. This can be a common issue and is not typically a cause for concern. You can take your car to a mechanic to have them tighten the heat shield and the rattling noise should go away.

Another potential cause for the rattling noise could be a problem with the exhaust system. It's important to have this checked out by a professional as it could lead to bigger issues if left unaddressed.

If you have recently installed a performance exhaust system on your Audi A3, the rattling noise could be coming from the new exhaust rubbing against other components. Double check the installation to make sure everything is securely in place.