New car sales soared by almost a third at the start of the year, figures revealed.
Some 13,624 new private cars were licensed last month, the Central Statistics Office (CSO) said.
The number was up just more than 30% from 10,469 during January 2010.
However, there was a drop in the registration of new goods vehicles to 969 last month from 1,016 in the same period last year.
The CSO report shows that seven in every 10 new cars sold during January were diesel.
Toyota was the most popular make of car sold, followed by Ford, Volkswagen and Renault.