http://economyincrisis.org/content/ford-comes-out-swinging-against-fta-south-korea<snip>The South Korean government uses a whole host of non-tariff barriers to keep foreign-made vehicles out of the market. South Korea uses efficiency standards, high taxes, restricted advertising hours and the assurance of an income tax audit to discourage the purchase of American-made automobiles.
Those tools have been extremely effective. In 2009, the U.S. exported just 5,878 autos to South Korea. South Korea, on the other hand, exported 476,833 autos to the U.S.
Korea has what Ford describes as “one of the most closed automotive markets in the world.” Imports make up just six percent of the market, the lowest foreign market share of all Organization for Economic Development and Cooperation nations.
Even if the terms of the agreement were renegotiated, it would be up to South Korea to hold up its end of the bargain, which hasn’t always been the case with the Asian nation. In the 1990s, the U.S. and South Korea negotiated two auto-specific agreements that removed some of the most overt non-tariff barriers, South Korean officials just replaced them with less overt barriers.
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I don't the think South Koreans are going to be purchasing many US made cars.