The industry is bracing to see whether Trump will impose tariffs on imports of vehicles and auto parts.
The company could challenge the market share of GM, Ford and Fiat Chrysler.
The departure will come as Ford continues work on a $11 billion restructuring plan.
Overall, the study showed a 4 percent improvement in vehicle dependability from 2018.
Ford told May that it may have to use alternatives sites outside of Britain.
He made the comments at the North American International Auto Show in Detroit.
The plan is aimed at achieving a 6 percent operating margin in Europe.