DETROIT (AP) — Mexico has become the most attractive place in North America to build new automobile factories, a shift that has siphoned jobs from the U.S. and Canada, yet helped keep car and truck prices in check for consumers. Just last week, Toyota announced a new plant in Guanajuato to build the popular Corolla, work now done in Canada, while Ford unveiled plans for Mexican engine and transmission factories. The German automaker will save $6,000 per vehicle in tariffs when it ships a Q5 to Europe, compared with building the same vehicle in the U.S., says Sean McAlinden, chief economist at CAR. The cost savings also should allow automakers to add expensive fuel-saving features to meet stricter U.S.