Why is my Audi A1 making a rattling noise under the hood?

I recently started noticing a rattling noise coming from under the hood of my Audi A1. It seems to happen when I start the engine and gets louder when I accelerate. What could be causing this and is it something I should be concerned about?

A potential cause of the rattling noise could be a worn-out crankshaft position sensor. The best course of action would be to take your car to a mechanic for a proper diagnosis and replacement if needed.