Imported car sales in South Korea jumped 30.4 percent on-year in March, helped by more aggressive marketing efforts, a local trade association said Friday. A total of 15,733 new foreign-made cars were sold in the one-month period, compared with 12,063 units a year earlier, the Korea Automobile Importers and Distributors Association (KAIDA) said. Annual foreign car sales hit a record high of 156,497 units in 2013. The latest tally showed a 13.6 percent increase in car sales vis-a-vis February when foreign original car equipment manufacturers sold 13,852 units.