Why does my BMW iX engine make a high-pitched noise?

I recently purchased a BMW iX and I've noticed that the engine makes a high-pitched noise when I start it up. It goes away after a few minutes, but it's still concerning. Is this a common issue and is there anything I can do to fix it?

The high-pitched noise you are hearing is most likely the engine's electric coolant pump. It is a normal sound and is necessary for the car's cooling system. It should go away after a few minutes and is nothing to worry about. If the noise persists for longer than a few minutes, you may want to have a mechanic take a look at it.

I've had a similar issue with my BMW iX and it turned out to be a loose or worn serpentine belt. I would recommend bringing your car to a mechanic to have them check and possibly replace the belt.

I've had the same problem with my BMW iX and it turned out to be a faulty alternator. I would suggest bringing your car to a dealership to have them check the alternator and potentially replace it.