Two problems related to engine belts and pulleys have been reported for the 2007 BMW 530. The most recently reported issues are listed below.
Car vibrates when ac is on. Passenger seat belt buzzes when no one is in the seat as well as seat belt tighten while driving. Transmission hesitant at times. ( transmission warning light come on at times, when car has already been service).
The contact owns a 2007 BMW 530i. While having the vehicle serviced, the contact was informed that the torque aluminum bolt on the engine pulley was fractured and would need replacing. The bolt was replaced. The current and failure mileage was 101,000.