NCT centres in Dublin, Limerick and Laois have the highest pass rates in the country this year.
Deansgrange, in the capital, tops the list, with a pass rate of 62 per cent.
Nearly 906,000 full NCT tests had been carried out in Ireland this year, up to last Saturday.
Over 54 per cent of them passed, and nearly 46 per cent failed.
There are, though, big variations around the country.
After Deansgrange, the second highest pass rate is Abbeyfeale in Co Limerick, at 61 per cent - while Portlaoise has a rate of 60.5.
The lowest in the country is Derrybeg in Co Donegal, with a rate of less than 39 per cent.
That's slightly better than centres in Clifden in Co Galway and Cavan, both at 42 per cent.
Over 55,000 cars that had full NCT tests this year were deemed unfit for use on a public road - meaning it's illegal to drive them.
Here's the breakdown:
NCT centres with highest pass rates
- Deansgrange - 62.14%
- Abbeyfeale - 61.34%
- Portlaoise - 60.52%
- Cork-Blarney - 59.99%
- Waterford - 59.88%
NCT centres with lowest pass rates
- Derrybeg - 38.81%
- Clifden - 42.24%
- Cavan - 42.37%
- Castlerea - 44.9%
- Carlow - 45.52%
- Letterkenny - 45.6%
