More than a third of car buyers said they moved up their purchase plans because of tariffs. Investopedia / Elizabeth Guevara Close Key Takeaways Tariffs influenced the buying decisions of more than a third of car buyers this year, showing the far-reaching effects of President Donald Trump's sweeping import taxes.That's according to market research firm J.D. Power, which found 36% of buyers factored in tariffs when purchasing a new vehicle this year, and 87% of those bought sooner than they had planned as a ...