Auto parts manufacturers typically sell the cheapest parts, and that is true of most brands.
However, the companies who have the biggest market share tend to be the most profitable.
In 2017, for example, Toyota and General Motors had the most market share with 17.3 percent and 14.4 percent, respectively, of the total.
The Ford Motor Company (NYSE: F) and Ford Motor Co. (NYSE, F) are second and third, respectively.
The data comes from a 2017 analysis of market share for nearly 3,000 U.S. auto parts suppliers, and it shows that Toyota and GM have a massive market share over their rivals.
This is true across nearly all categories of the auto parts industry, from parts to engine and transmission parts.
Toyota and GM are the only two U.K.-based companies in the top five.
The other two are General Motors and Fiat Chrysler Automobiles (NYSE : FCHA), which are tied with just 7.3 and 7.4 market share, respectively—a little over 1 percent.