Power Steering Failed problems of the 2006 Lexus Rx400h

While traveling east on rt 2 in massachusettes the right front tire hit a bump in the road and blew out. At this instant the power steering completely failed making it extra difficult to get the vehicle under control. I later took the vehicle back to Lexus of manchester new hampshire where I purchased it and they confirmed that the ecu had failed by swapping it out with a known good one from another vehicle. I feel that this would be a very dangerous for anybody was not strong enough to be able control force that a flat tire puts on the steering wheel under these circumstances.