Through September, Roberts has calculated, new-vehicle sales to individual buyers, excluding sales to rental companies and other commercial fleets, are up 7%. Of that growth, 43% came in the $20,000-to-$30,000 price range — the largest share for that price category in at least four years. (For used vehicles, the shift is even more pronounced: 59% sales growth in the $15,000-to-$20,000 price range over that period.)

Sales of compact and subcompact cars and SUVs from mainstream auto brands are growing faster than in any year since 2018, according to data from Cox Automotive.

The sales gains for affordable vehicles is, in some ways, a return to a pattern that existed before the pandemic. As recently as 2018, compact and subcompact vehicles — typically among the most popular moderately priced vehicles — had accounted for nearly 35% of the nation’s new vehicle sales.

The proportion started to fall in 2020, when the pandemic caused a global shortage of computer chips that forced automakers to slow production and allocate scarce semiconductors to more expensive trucks and large SUVs. As buyers increasingly embraced those higher-priced vehicles, the companies posted robust earnings growth.

In the meantime, they deemed profit margins for lower-prices cars too meager to justify significant production of them. By 2022, the market share of compact and subcompact vehicles had dropped below 30%.

This year, that share has rebounded to nearly 34% and rising. Sales of compact sedans were up 16.7% through September from 12 months earlier. By contrast, CarGurus said, big pickups rose just under 6%. Sales of large SUVs are barely up at all — less than 1%.

Ford’s F-Series truck remains the top-selling vehicle in the United States this year, as it has been for nearly a half-century, followed by the Chevrolet Silverado. But Stellantis’ Ram pickup, typically No. 3, dropped to sixth place, outpaced by several less expensive small SUVs: the Toyota RAV4, the Honda CR-V and the Tesla Model Y (with a $7,500 U.S. tax credit).

The move in buyer sentiment toward affordability came fast this year, catching many automakers off guard, with too-few vehicles available in lower price ranges. One reason for the shift, analysts say, is that many buyers who are willing to plunk down nearly $50,000 for a new vehicle had already done so in the past few years. People who are less able — or less willing — to spend that much had in many cases held on to their existing vehicles for years. The time had come for them to replace them. And most of them seem disinclined to spend more than they have to.

With loan rates still high and average auto insurance prices up a whopping 38% in the past two years, “the public just wants to be a little more frugal about it,” said Keith McCluskey, CEO of the dealership where Chumley bought her Trax.

Roberts of CarGurus noted that even many higher-income buyers are choosing smaller, lower-priced vehicles, in some cases because of uncertainties over the economy and the impending presidential election.

The shift has left some automakers overstocked with too many pricier trucks and SUVs. Some, like Stellantis, which makes Chrysler, Jeep and Ram vehicles, have warned that the shift will eat into their profitability this year.

At General Motors’ Chevrolet brand, executives had foreseen the shift away from “uber expensive” vehicles and were prepared with the redesigned Trax, which came out in the spring of 2023, noted Mike MacPhee, director of Chevrolet sales operations.

Trax sales in the U.S. so far this year are up 130%, making it the nation’s top-selling subcompact SUV.

“We’re basically doubling our (Trax) sales volume from last year,” MacPhee said.

How long the preference for lower-priced vehicles may last is unclear. Charlie Chesbrough, chief economist for Cox Automotive, notes that the succession of expected interest rates cuts by the Federal Rates should eventually lead to lower auto loan rates, thereby making larger vehicles more affordable.

“The trends will probably start to change if these interest rates start coming down,” Chesbrough predicted. “We’ll see consumers start moving into these larger vehicles.”

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AP Economics Writer Christopher Rugaber in Washington contributed to this report.