Some customers have balked at paying top dollar for new cars and have opted to make do with older vehicles. That has increased demand for parts and service, one of the most profitable businesses for car dealers. Many dealers have extended repair-shop hours. Mr. Ricart said he had some repair technicians putting in 10- or 12-hour days three or four days in a row before taking a few days off.
Of course, the shortage of cars will end, but it isn’t clear when.
As Covid-19 cases and deaths rose last spring, automakers shut down plants across North America from late March until mid-May. Since their plants were down and they expected sales to come back slowly, they ordered fewer semiconductors, the tiny brains that control engines, transmissions, touch screens, and many other components of modern cars and trucks.
At the same time, consumers confined to their homes began buying laptops, smartphones and game consoles, which increased demand for chips from companies that make those devices. When automakers restarted their plants, fewer chips were available.
Many automakers have had to idle plants for a week or two at a time in the first half of 2021. G.M., Ford Motor and others have also resorted to producing vehicles without certain components and holding them at plants until the required parts arrive. At one point, G.M. had about 20,000 nearly complete vehicles awaiting electronic components. It began shipping them in June.
Ford has been hit harder than many other automakers because of a fire at one of its suppliers’ factories in Japan. At the end of June, Ford had about 162,000 vehicles at dealer lots, fewer than half the number it had just three months ago and roughly a quarter of the stocks its dealers typically hold.
This month, Ford is slowing production at several North American plants because of the chip shortage. The company said it planned to focus on completing vehicles.
Mr. Ricart recently took a trip on his Harley-Davidson to Louisville, Ky., and got a look at the trucks and S.U.V.s at a Ford plant that are waiting to be finished. He said he had seen “thousands of trucks in fields with temporary fencing around them.”