The latest figures from the Central Statistics Office show that the number of new cars licensed in March inched 0.1% higher than the same time last year.
The CSO said that 10,596 new cars were licensed last month, compared with 10,581 in March 2012.
Of the new cars licensed last month, 29.1% were petrol while 70.4% were diesel.
The most popular brand of car sold last month was Volkswagen, followed by Nissan, Toyota and Ford.
The CSO figures also show that the number of new goods vehicles licensed last month came to 1,057, down 8.5% from the same time last year.