Many of their suppliers are teetering on the verge of bankruptcy themselves, and do not have the luxury of extending credit much longer…

When suppliers big and small start failing, the flow of parts to every automaker in the country will be disrupted because as suppliers typically sell their products to both American and foreign brands with plants in the United States.

“There’s no question it will hit Toyota, Honda and Nissan too,” said John Casesa, principal in the auto consulting firm Casesa Shapiro Group.

“Many of the small suppliers will simply liquidate because they don’t have the resources to go reorganize in Chapter 11 bankruptcy,” Mr. Casesa said. “They’ll just go away.”