* What constitutes "American-made"? A car might be assembled in the US but use many foreign-made parts. Conversely, a car assembled overseas might utilize a significant percentage of US-made components. There's no universally agreed-upon threshold for what percentage of US-made content qualifies a vehicle as "American."
* Data limitations: While sales figures for individual car manufacturers are tracked, these don't directly translate to a count of how many Americans drive cars meeting a specific "American-made" definition. Registration data also doesn't usually categorize cars by the origin of their components.
* Changing landscape: The percentage of US-made components in cars varies over time and across manufacturers.
Therefore, while you can find statistics on car sales broken down by manufacturer, you cannot find a reliable, precise number of Americans driving cars that meet any specific definition of "American-made." Any attempt at a numerical answer would be an estimate based on assumptions about what constitutes "American-made" and would likely vary significantly depending on those assumptions.
