U.S. automakers worry that President Donald Trump's agreement to tariff Japanese vehicles at 15% would put them at a competitive disadvantage, saying they will face steeper import taxes on steel, aluminum and parts than their competitors.

T he U.S. and Japan have reached a trade agreement under which the longtime U.S. will face a 15% tariff—down from a previously threatened 25%—President Donald Trump announced on Tuesday, as Japan’s Prime Minister hailed the move as a “new golden era” in the relationship between the two countries.

It is the most significant of a clutch of agreements Trump has bagged since unveiling sweeping global levies in April, though like other deals, exact details remained unclear.