Automaker Ford will have to close assembly lines in the United States next week if no engines arrive from Mexico by then.
Ford has outsourced engine production to factories in the Mexican region of Chihuahua.
Christopher Landau, the US ambassador to Mexico, reports this after meeting a board member of Ford.
Because of the corona crisis, the Mexican factories are only running at half power under the authority of the government.
Mexico is an essential part of an international supply chain that is critical for US automakers. Many US companies have factories outside the US because of the lower labour costs.