I should be clear. The study looked at all three, but the numbers I presented were for the impact only of Japan. But the numbers in the study exist for Korea, for Japan, or for the EU, and for all three together. Under any scenario, the impact is well under 1% of production in Canada.
The reason is that the vast majority of cars produced in Canada are sold in the United States, and so would not be impacted by a trade agreement between Canada and anybody else. As well, the Canadian market is already saturated with imports; four out of five cars sold in Canada are imported. So it's likely that if more cars are imported through a free trade agreement, they're going to displace other sources of imports and not Canadian manufacturing.