In the week after Standard & Poor's downgraded U.S. government debt, credit remained both available and affordable for the auto industry.
But even as automakers say they'll stay the course on production and sales for the rest of the year, consumer confidence remains a big worry.
In an unscientific Automotive News online survey of U.S. auto dealers, more than 70 percent of the 372 respondents said that, based on their sales and floor traffic, consumer confidence is down.
"The phones have stopped ringing, consumer confidence is low," one respondent wrote. Said another: "Several customers have told us they are going to hold off on buying because of drop in stock market -- six or seven of them."
"Consumer confidence is pretty fragile right now," Don Johnson, General Motors' U.S. sales chief, told analysts last week. "It's been ebbing and flowing throughout the year."
But, he added, "We know that there is continuing pent-up demand in the market."
Nicholas Stanutz, Huntington National Bank's senior executive vice president in charge of auto finance and dealer service, also said consumers are skittish.
"What most probably will change is consumer confidence," he wrote in an e-mail. "The stock market is deteriorating, eroding wealth."
He wrote that the economy is vulnerable and there is a "much higher probability of a double-dip now, so car sales will fall as a result."
Tom Doll, COO of Subaru of America, said the market plunge "appears to be an overreaction to the downgrade."
"At this time, we do not believe this is going to have any impact on our sales or production plans," Doll said.