I am just worried about d failing my nct in Thursday night over them
If they do, we'll talk you through replacing.
Making more sense now with all the questions.
I'm not sure of ROI NCT system but here in UK, often the best way, especially if not sure what you are doing, is to bung the motor in for the test (MOT over here) and then deal with the fail list (if any)
Over here a re-test is free within 7 days so very useful.
Check your lights are working, brakes not pulling and handbrake holding, wipers cleaning properly with no smears and washer bottle full and working. And Horn.
Tyre tread depths, any uneven wear and pressures.
Put in for test, keep fingers crossed and come back to us with specifics if needed.