The "Fast Money" traders debated Thursday what is the best play in the auto space, amid tweets from Donald Trump threatening to impose an import tariff to prevent jobs moving to Mexico and other low-cost countries.

Earlier on Thursday, Trump rebuked Toyota Motor on Twitter after the Japanese automaker said it had no plans to curb production in Mexico. Toyota shares ticked lower after the tweet, hitting a session low of $120.32. The stock ended the session slightly above that level at $120.44.