During April, there were 5,567 National Car Tests carried out in Donegal.
2,699 passed this test, while 2,428 failed and 440 failed dangerously.
Letterkenny was the busiest test centre, carrying out 2,438 inspections, where 206 failed dangerously.
Derrybeg held the fewest tests at 720, with 47 failed dangerous tests.
