The National Car Test (NCT) is a roadworthiness inspection. The RSA explains the test schedule and exemptions. An NCT pass records the condition of tested items at that time; it is not a warranty or a substitute for servicing.
What Does the NCT Check?
The NCT is a visual and mechanical inspection covering:
- Brakes — efficiency, balance and parking brake
- Lights — all bulbs working, headlight alignment, lens condition
- Tyres — tread depth (minimum 1.6mm), condition, correct size
- Suspension — shock absorbers, springs, ball joints, bushings
- Steering — play in the steering, power steering condition
- Exhaust & emissions — CO and HC levels, exhaust leaks, catalytic converter
- Body & chassis — rust, structural integrity, seatbelt anchorage
- Windscreen & wipers — chips, cracks, wiper effectiveness
- Seatbelts — operation, webbing condition, buckles
Five Areas to Check Before the NCT
1. Headlight Alignment
Your headlights are tested on a beam machine. Even slightly misaligned headlights will fail you. Fix: Any garage can adjust headlight alignment for €20–40. Do it the week before your test.
2. Brake Performance
Brakes are tested on a roller. Worn pads, sticky calipers, or imbalanced braking will fail. Fix: Get brake pads and discs checked. Budget €150–300 per axle if they need replacing.
3. Tyres
Check tyre tread, sidewalls and pressures. Use a tread-depth gauge and ask a tyre professional to assess uneven wear or damage; a coin is not a substitute for an accurate measurement.
4. Emissions
If an emissions or DPF warning is present, follow the vehicle handbook and ask a qualified garage to diagnose it. Do not rely on a fast drive before the test to repair a fault.
5. Suspension
Worn shock absorbers, broken springs, or perished bushings. Fix: Bounce each corner of the car — if it bounces more than once, the shocks are worn. Budget €200–400 per pair for replacement.
Pre-NCT Checklist
Do this the week before your NCT:
- Check all lights work (headlights, indicators, brake lights, reversing lights, fog lights)
- Check tyre tread depth and pressure
- Top up washer fluid
- Clean the windscreen inside and out
- Check wiper blades aren’t torn
- Make sure the horn works
- Check handbrake holds on a hill
- Have the cause of any dashboard warning light diagnosed and repaired; do not simply clear the warning
What Happens if You Fail?
Follow the failure report and arrange repairs before a retest. NCTS lists a €40 retest fee; checks that need no test equipment are free. Confirm the booking and completion deadlines directly with NCTS so you do not miss the retest window.
Thinking about buying a used car? Check the NCT certificate and service records. The free Motorly check adds available listing context; it does not supply a full vehicle history or verified NCT record.