I am not too worried. US cars are simply increasingly less competitive by the day. Transition to electric is going on at a good rate. In a few years only Tesla will have competitive offers, (possibly not even they). Gas guzzlers will be items for the rare confused with too much money. Maybe some of those electric abominations could be an issue but then I'll want to see that first. So far I don't see any indication for that. Most people want affordable cars.
Also for any of that to happen in the first place, a number of laws would have to be scrapped and that needs majority in the Council and European Parliament. Given the hostility from the US and the not too popular nature of that demand let them try. Chances are very high that this "pact" will be obsolete by the time anyway.
