Why does my BMW 5 Series engine make a rattling noise?

I recently purchased a used BMW 5 Series and have noticed a rattling noise coming from the engine. What could be causing this and how can I fix it?

The rattling noise could be caused by a variety of issues, including loose components or worn out parts. It's best to bring your car to a certified mechanic for a proper diagnosis and repair.

Check your oil levels to make sure it is at the appropriate level. Low oil could be causing the rattling noise. If the levels are fine, it's best to have a professional inspect your engine.

Have you recently had any major repairs or maintenance done on your car? It's possible that something was not properly tightened or installed, causing the rattling noise. Bring it back to the shop to have it checked.