How to troubleshoot engine performance issues in a BWM?

I recently noticed that my BWM's engine is not performing as well as it used to. It is noticeably slower and sounds rougher than before. How can I troubleshoot and fix these engine performance issues?

First, make sure to check your spark plugs and air filter, as these are common culprits for poor engine performance. If they are dirty or worn out, replace them. Also, check your fuel filter and ensure it is not clogged. If these basic maintenance steps don't improve performance, it could be a more serious issue and you should take your BWM to a reputable mechanic.

Have you recently had your BWM serviced? It's important to keep up with regular maintenance to prevent engine performance issues. If it has been a while since your last service, bring your BWM in for an inspection and tune-up. This can often solve any underlying issues and improve engine performance.