By Dan Burns and Howard Schneider

(Reuters) – As the world emerged from pandemic shutdowns in early 2021, a supply chain shock left a lasting imprint on the cost of owning a car in the U.S., spilling out first through prices of used and then new cars and on to replacement parts and finally to loan costs and vehicle insurance rates.

That sustained inflation in the auto industry – vehicle and parts prices are 20% higher than before the pandemic; insurance more than 60% – put a persistent prop under consumer inflation overall, which President Donald Trump may risk reinforcing with 25% tariffs on imported vehicles.

The Trump import tax shock may be hitting a different economy. Consumers four years ago were flush with cash from pandemic aid, and while vehicle sales have remained below pre-pandemic levels they did climb as the economy fully reopened.

It also may prove a far more persistent force in auto pricing than the pandemic supply-chain issues, which unwound as computer chips and other parts flowed from reopened plants and ports.

With some consumers already stretched and auto loan delinquencies rising, the tariffs may create a confusing new cost and pricing problem whose solution – at least the one Trump envisions – involves a years-long and likely expensive shift towards domestic production.

“The 25% tariff on autos and parts will create immediate price increases and wreak havoc on supply chains,” said Art Wheaton, director of labor studies at Cornell University’s School of Industrial and Labor Relations, and a specialist in transportation industries. “The U.S. imports about half of the autos we sell and a significant chunk of the parts.”

Wheaton estimates the Trump levies, once the impact of delayed tariffs on imported parts is taken into account, could add $10,000 to $20,000 to vehicle prices.

It is among the more aggressive estimates, but he said “if the end goal is to increase production of parts and assembly in the United States, then the tariffs would likely need to be consistent for decades to allow planning for the shifting supply chain.”

JP Morgan economist Michael Feroli sees it adding to inflation this year and lowering overall growth due to the impact on consumers, an outlook consistent with recent downgraded forecasts from Federal Reserve policymakers.

Tariffs could push the Personal Consumption Expenditures price index, excluding food and energy, 0.3 percentage point higher by the end of the year, to 3.1%, further from the Fed’s headline target of 2%, Feroli said. “The resulting squeeze on consumer real purchasing power will further weigh on real consumer spending,” and coupled with eroding business sentiment will drive economic output lower by 0.2 percentage point, to a turgid 1.3%.