Over half of vehicles tested failed the NCT in Donegal during September.
Of the 5,391 tests taken 2,761 did not pass, which includes 386 vehicles which failed dangerous, representing 51% of tests.
This represents a 2% increase in failures compared to August when over half of the vehicles tested were deemed to be road worthy.
Letterkenny had the most tests, with 2,592 vehicles tested and a 48% pass rate.
There were 1,460 tests in Donegal Town, with a 49% pass rate, while Carndonagh had 678 tests and a 46% pass rate.
Derrybeg was the only centre where a majority of cars passed the NCT last month, with 661 tests and a 55% pass rate.
