Why is the exhaust on my BMW M3 making a strange noise?

I recently noticed that my BMW M3's exhaust is making a strange noise. It sounds like a metallic rattling sound. What could be causing this and how can I fix it?

This could be a sign of a loose exhaust pipe or a failing exhaust system. I recommend taking your car to a trusted mechanic to get it checked and repaired if necessary.

It's possible that there is a problem with the exhaust manifold or catalytic converter. These components can be expensive to replace, so it's best to have a professional diagnose the issue.

Have you recently made any modifications to your exhaust system? If so, the aftermarket parts could be the cause of the strange noise.