Volkswagen, which stopped selling diesel cars in the U.S., said the impact of a widening emissions scandal caused its sales to plunge nearly 25 percent during the month.

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DETROIT — While other automakers were reporting gains in a strong market for new vehicles in November, Volkswagen said Tuesday the impact of a widening emissions scandal caused its sales to plunge nearly 25 percent during the month.

The results suggest Americans are turning their backs on the German brand since it admitted in September to installing software to cheat on emissions tests on 11 million diesel vehicles worldwide.

Volkswagen said it sold 23,000 vehicles in the United States during the month, down from 31,000 a year earlier. The company’s Audi luxury brand fared better, posting a gain of less than 1 percent.

VW said its sharp decline was caused, in part, by its decision to stop selling all diesel cars that do not comply with federal emission standards.

In addition, regulators in the United States and Europe are investigating VW for exaggerating claims about fuel efficiency and emissions on conventional gasoline vehicles.

A company official reiterated previous statements that Volkswagen was working to develop repairs for the affected vehicles.

“Volkswagen is working tirelessly on an approved remedy,” said Mark McNabb, the chief operating officer of Volkswagen of America.

But analysts said Volkswagen’s dismal sales performance in November was evidence that many consumers were abandoning the brand in greater numbers.

“Volkswagen has been hit with the double whammy of the emissions scandal and the fact they are relying on cars that nobody really wants,” said Alec Gutierrez, an analyst with the auto-research firm Kelley Blue Book.

The steep drop in sales came during a month in which most automakers benefited from healthy demand for new vehicles, particularly pickup trucks and sport-utility models.

Analysts estimated that industrywide sales increased 2 percent during November to more than 1.3 million vehicles. And the closely watched, seasonally adjusted annual selling rate was expected to exceed 18 million vehicles during the month.

General Motors, the nation’s largest automaker, said it sold 229,000 vehicles in November, which represented a 1.5 percent increase from a year ago.

Among foreign automakers, Toyota said its sales increased 3.4 percent and Nissan reported a 3.8 percent gain. Honda fell by 5.2 percent.