Why does my BMW X6's engine make a strange noise on start up?

I recently purchased a BMW X6 and have noticed that the engine makes a weird noise when I start it up. It doesn't always happen, but I've noticed it more frequently in the morning. Should I be concerned? What could be causing this noise?

Hi Jenna, thank you for your question. This is a common issue with BMW X6's and it is usually due to a faulty vanos solenoid. It's a relatively easy fix, so I would suggest taking your car to a certified technician to have it checked and replaced if necessary.