I experienced an unexplained and unexpected loss of power steering assist necessitating immediate (manual) steering effort, which resulted in a vehicle crash. I brought in the vehicle to a local independent service center (not Ford) for inspection and diagnosis and the mechanic reported a problem with the electric power assist system. I called Ford Customer Service and they reported "0" recalls on my vehicle. There are no warning lamps/messages that I am aware of. I would like a closer look (investigation) given that other exact year, make, and model Ford vehicles have experienced recalls on this specific component. Ford's number for a similar recall is "15S18".