Many U.S. "manufacturers" are only marketers, if even that. In my work, I commonly see many identical parts from different "manufacturers" that were all made in the same plant, in the same country. Interestingly, some Asian sourced parts seem to be exported to Mexico, where they are "cleansed" of their country of origin, and marketed to the U.S. as being "Made in Mexico". Vehicular electrical components are really bad for this. If they were made in Mexico, how did they end up with exactly the same flaws, including flaws in the circuit boards, housing castings, and other components?