BMW X5 F15 2016 Engine cooling fan not working

[AGH]

Dears, I have a BMW X5 F15 2016. The engine cooling fan seems not working. I noticed this when the AC was not working well while the car was in parking mode, it was working relatively OK while running. Also, now with hot weather I have problem with overheating even running. So, I looked at the fan and it is not turning. There are some small moves like kicks. See here

https://youtube.com/shorts/b5U0x7xi2HE?feature=share

I took it to a BMW dealer and they told me it is the fan based on their diagnostic device 3000$ to change.

I changed the fan with a spare part but it is not working. I changed it with another spare fan not working again. It is not fuse or relay. There is electricity is in the fan wire. Before buying a new fan which costs me 3000$ I want to ensure it is not something else. Could it be the BDC? or Thermostat or something else?

[RED_Y_]

Check engine light is on? Did you try to read errors using ISTA? Did you check fuses? $3000 is quite expensive for the fan alone. Might be a bad temperature sensor too, you can check coolant temperature using service menu.

[Tomcat_F15_STL]

I concur. ISTA is what you need.