iPhone 11pro do not paired with 2013 X3

I had my cell phone was paired with my 2013 X3 and was working fine but since latest iPhone software update it is not pairing at all. I delete my paired phone from my car but I couldn’t add new number. When I try it gives BMW pass key that I entered on my car dashboard but it don’t get connected and getting error message to try again but not working. Any help will be appropriated.