Flat Rock Assembly Plant, formerly known as the Michigan Casting Center (1972–1981), Mazda Motor Manufacturing USA (1987–1992) and AutoAlliance International (1992–2012), is a Ford Motor Company assembly plant located at 1 International Drive in Flat Rock, Michigan in Metro Detroit.

[1] Despite the sizable capital investment, frequent union labor problems and work injuries[2] and declining demand for the V8 engine blocks produced there led the facility's closure in 1981.

[7] Ford repurchased a 50% share in the plant on April 15, 1992, and it officially became a joint-venture and was renamed AutoAlliance International on July 1, 1992.

Production of North American Mazda 6 began in the 2003 model year, followed by the Ford Mustang starting in 2005.

[10] On July 15, 2015, Ford confirmed that the new 2017 Lincoln Continental sedan would be produced at the Flat Rock plant starting in 2016.