What are the common causes of a noisy engine in a BWM?

I've noticed that my BWM's engine has become increasingly noisy lately. It's bothering not only me but also my passengers. What could be causing this and how can I fix it?

There are a few potential causes for a noisy engine in a BWM. One possible culprit could be worn out or loose belts, so it's worth checking those first. It's also possible that there could be an issue with the exhaust system, such as a leak or a damaged muffler. Another possibility could be that the engine oil is low or needs to be changed. It's also a good idea to have the timing belt checked, as a worn out or damaged timing belt can cause loud noises. My advice would be to take your car to a certified mechanic as soon as possible to have it properly diagnosed and repaired.