In Croatia's supplier plants, the most closely studied document this season is not an order book but a draft rule from Brussels. Germany and France are championing a 'Made in Europe' push that would tie EU subsidies to where a car — and its components — actually come from. The sentence that matters to Croatian parts makers is short: models built in France, Portugal and Eastern Europe would benefit only if enough of their parts come from Europe. For a country whose components feed Europe's assembly lines, that single condition could redraw sourcing maps across the continent.

The mechanics are blunt. Cars imported from Japan would not qualify for EU subsidies at all — a clear message that Brussels wants production, and its supply chain, on European soil. Vehicles assembled in France, Portugal and Europe's east would qualify only if enough of their parts come from Europe, a threshold that turns every locally sourced component into a bargaining chip. For Croatia, an EU member on the Adriatic, the arithmetic is seductive: the more a carmaker sources from Croatian suppliers, the closer it gets to Brussels' money.

Yet the rules that flatter Croatian parts are fraying nerves across the industry. The Made in Europe push is already unnerving global suppliers, who see costs climbing and competitiveness slipping as sourcing networks honed across continents face rewiring. The unease reaches well beyond Europe's borders: with Japanese-built cars locked out of subsidies, suppliers from Seoul to Stuttgart are recalculating their bills of materials and asking which links of their chains will suddenly count — and which will not.