Why is my BMW X5's engine making a strange ticking noise?

I've noticed that my BMW X5's engine makes a ticking noise when I start it up. It seems to go away after a few minutes, but it's still worrying. What could be causing this and is it something I should be concerned about?

This ticking noise is most likely caused by the valve lifters in your engine. Over time, these can become worn or dirty, causing them to make a ticking noise. It's important to get this checked out by a mechanic, as it can lead to further engine damage if left untreated.

Another possibility is that the noise is coming from a loose or worn belt in your engine. This is a relatively easy fix and won't cause any major damage, but it's still a good idea to have it checked out by a mechanic to avoid any potential issues down the road.