Mazda today announces plans to build a new assembly plant in Mexico and a sales company in Brazil in partnerhsip with Japanese trading-house Sumitomo.

The move follows an announcement last month that Mazda plans to pull out of its Auto Alliance International joint-venture with Ford in Flat Rock, MI.

The auto maker has built the Mazda6 midsize sedan at the plant since 2002.

Mazda says the new JVs will enhance both partners’ business in the rapidly growing Central and South American markets.

The production facility, slated to begin operations in fiscal 2013, will be located in Salamanca, about 155 miles (250 km) northwest of Mexico City and have an annual capacity of 140,000 units, the auto maker says. It will build the Mazda2 B-car and Mazda3 C-car models.

The Brazilian sales company will launch operations in fiscal 2012 and initially sell vehicles imported from Japan.

Once the Mexico facility starts production, it will ship vehicles to the Brazil unit, Mazda says.