Tariffs bite auto supply chains
Analysts estimate nearly $12bn in tariff‑related losses for the global auto industry as metal and derivative tariffs raise production costs across the supply chain. The UK could only see current U.S. tariffs on steel, aluminium and derivative goods removed if it meets American supply‑chain security requirements, highlighting how trade relief is becoming conditional on procurement and traceability. (digitaldealer.com (commonslibrary.parliament.uk)
Tariffs on cars and metals are now hitting the same supply chain, raising costs from raw steel to finished vehicles. (digitaldealer.com) Digital Dealer reported on March 31 that United States auto tariffs added $30 billion in industry costs in 2025 and lifted average vehicle sticker prices by 10.4%. It said imported vehicles saw price increases of $5,000 to $8,900, while domestic vehicles rose $1,600 to $2,000 because steel and aluminum got more expensive too. (digitaldealer.com) Bloomberg reported on April 15, 2025 that the 25% tariff on foreign-made vehicles took effect on April 3, 2025, and auto parts were due to face the same rate on May 3, 2025. It also noted that about half of the roughly 16 million new passenger vehicles sold in the United States in 2024 were assembled outside the country. (bloomberg.com) That matters because cars are built from thousands of parts that cross borders repeatedly before final assembly. Bloomberg said engines, alternators, springs and other components are sourced globally, making it hard to isolate one tariff from another. (bloomberg.com) The metal side of the policy kept moving as well. The House of Commons Library said the United States imposed a 25% tariff on all steel, aluminum and derivative goods on March 12, 2025, then raised that rate to 50% on June 4, 2025, and expanded the scope again in August 2025. (commonslibrary.parliament.uk) On April 2, 2026, President Donald Trump signed a new proclamation that reworked those metal tariffs again. Federal Register and White House documents said the new rules took effect on April 6, 2026, with 50% tariffs for many metal articles and 25% tariffs for many derivative products made with steel, aluminum or copper. (federalregister.gov) (whitehouse.gov) For automakers, that means a seat frame, wheel, fastener or stamped body part can carry extra cost before it ever reaches a vehicle plant. Trade advisers at KPMG and White & Case said the April 2026 changes shifted many derivative products to tariffs on the full customs value of the item, not just the metal inside it. (kpmg.com) (whitecase.com) The United Kingdom won only partial relief. The House of Commons Library said the Economic Prosperity Deal announced on May 8, 2025 would let the United Kingdom export up to 100,000 passenger vehicles to the United States at a 10% tariff, while removal of the steel, aluminum and derivative-goods tariff depends on meeting American supply-chain security requirements. (commonslibrary.parliament.uk) That condition ties tariff relief to proof about where inputs come from and how they move through the chain. The same Commons briefing said the terms of the deal have only been partially implemented so far, leaving the United Kingdom with conditional access rather than a clean exemption. (commonslibrary.parliament.uk) S&P Global Mobility warned as early as February 4, 2025 that the North American auto system faced “substantial disruptions” from new tariffs on Canada, Mexico and China. More than a year later, the direction of travel is clearer than the rules: more duties, more tracing of parts, and higher costs embedded in every vehicle. (spglobal.com)
