Brakes and Rotors on 2006 BMW 530xi

Is it custom to replace rotors and brakes on bmws no matter what?

Asked by for the 2006 BMW 530xi
It is. BMWs use high-performance brake materials, which means that they are relatively soft and are generally not "turned". It is common to replace them, which is one of the reasons why it's expensive to drive a BMW. This is covered under their maintenance warranty, if you still have it.