SEOUL – Kia's global sales fell 2.8 percent in January, while sales of affiliate Hyundai rose 3.5 percent in the same period.
The figures, revealed in a regulatory filing on Wednesday, show Kia sold 211,034 vehicles and Hyundai 321,757.
Earlier this year, the two Korean automakers said they expected growth to slow in 2012.
In January, the chairman of Hyundai and Kia, Chung Mong-koo, told employees he predicted sales of 7 million cars for the two firms, a rise of 6 percent compared to growth of 15 percent in 2011.
Kia said at the end of January it aimed to raise global sales to 2.71 million vehicles this year, from 2.48 million last year, which would mark 9.5 percent growth - half that of last year.
Hyundai's 2011 sales were 4.05 million vehicles, a 12 percent increase over 2010.
Based on chairman Chung Mong-koo's prediction, the firm expects to grow 5.9 percent in 2012 on sales of 4.29 million.
Sources: Bloomberg/Automotive News Europe