Maruti Suzuki defied the worst slowdown in 12 years for India's car market with a stunning 80 per cent year on year increase in net profit at Rs. 1,150 crore for the fourth quarter, benefiting from robust sales of its Ertiga multi-purpose vehicle and a sharp decline in the yen, Shinzo Nakanishi, director and former MD and CEO of Maruti Suzuki announced today. Its market share rose to 39 per cent in FY13, he added.