Update:


took it to a Bimmer shop, he was impressed with my car, how nice it drives and it has absolutely no noise,
he noticed the noise was because of my brakes, which are almost gone, he also said the axle is in perfect shape. he repeated completely perfect. it was good that I found out about the torn boot before it makes any damage to the axle.

I will have my CV boots and brakes replaced at same time.

so for other people who might google and find this thread. those kind of random noise from the wheel that goes away randomly might be from your brakes pad or brake rotors