Why is my BMW 6 Series engine making a knocking sound?

I have a BMW 6 Series and recently noticed that the engine is making a knocking sound. What could be causing this and what should I do to fix it?

It's possible that the knocking sound is caused by low oil levels or dirty oil in your engine. I suggest checking the oil level and if it's low, top it off with the recommended oil for your BMW 6 Series. If the oil is dirty, get an oil change as soon as possible.

Another possible cause for the knocking sound could be worn out spark plugs. These should be replaced regularly according to your BMW's maintenance schedule. I recommend checking your spark plugs and replacing them if needed.

Sometimes, a knocking sound can be caused by a loose or worn-out belt in the engine. I suggest checking the condition of your belts and tightening or replacing them if necessary.