One problem related to power assist brake has been reported for the 2006 BMW 750. The most recently reported issues are listed below.
Took my car in to be serviced and was informed of this leak in the vacuum pump and steering switch. Consequently, I seen there was a recall for 2006 Bmws with a NHTSA campaign id number of 10v446000 with a recall date of 2012-10-01 for the vacuum pump. I called the dealership and they told me my car wasn't included. . . . . But I believe it should be.