New car registrations for August were 14% higher at 7,313 than the same month last year, according to new figures from the Society of the Irish Motor Industry.
SIMI data also shows new car sales for the first eight months of the year are up 19% to 138,538 on the same period in 2015.
Commercial vehicles are also continuing to perform well, with Light Commercial Vehicle (LCV) sales up 11% in August to 1,815 – and LCV sales are 22% higher for the first eight months.
Heavy Goods Vehicle (HGV) registrations rose by 49% for the month, with registrations up 41% for the year to date.
Commenting on the figurers, SIMI Director General Alan Nolan said: "The Motor Industry has been working hard to deliver the continuing level of growth in what has been a noticeably more difficult market since June.
“As we move toward the end of third quarter of the year the Industry remains focused on business still to be done, with strong offers still available for consumers.
“In contrast with the era before the two-period registration system was introduced, when sales were all but finished in the first quarter, the interest in new vehicle sales now tends to carry to the end of the third quarter, but obviously at a lower rate. “
SIMI said the motor industry is still on course to deliver close to 150,000 new car sales by the end of the year.