[belorn]

There isn't any major car manufacturer (that I know of) which isn't deeply tied to the government of their country of origin, enjoying everything from massive amount of subsidies to access to military intelligence networks. Sometimes even specific laws are written explicitly to support that specific company. Like aircraft manufacturers, car manufacturers are also generally military manufacturers so the internal lines within those that distinguish between private company, government, and military get very blurry.

I don't see a proper response for other countries when dealing with such entities. Most likely it going to be an equal blurry mess of trade policies, foreign policy, and military policy.