Lose Power Steering problems of the 2011 BMW X5

Vehicle lost all power (mechanical and electrical) without warning. This occurred while cruising at highway speed, under normal conditions. The vehicle lost power steering and braking became significantly more difficult. After drifting safely to the highway shoulder the vehicle remained disabled and could not started. The car exhibited no signs that it would start again. Instrumentation did not display information and towing was necessary. Several days after delivery to the BMW service center, technicians advised they had attempted to repair the problem. The stated cause was vanos bolts shearing off into the engine. However, on the test drive the vehicle suffered another complete failure, leaving it disabled. 56 days later a remanufactured engine had replaced the original due to failed repair attempts.