NCT Guide Ireland

Fix the common NCT failures without reading a manual

Quick sections for the failures that cost Irish drivers the most time: what failed, what it may cost, and whether you should DIY or use a garage.

Common failures

3.1

Brakes

Service brake performance insufficient

Fix: Replace brake pads and/or discs

3.2

Brakes

Brake pads worn beyond minimum thickness

Fix: Replace brake pads — front or rear

3.3

Brakes

Brake discs worn, scored or corroded

Fix: Replace brake discs

4.1

Tyres

Tyre tread depth below legal minimum (1.6mm)

Fix: Replace worn tyre(s)

4.2

Tyres

Tyre sidewall damage or bulging

Fix: Replace damaged tyre immediately

5.1

Lighting

Headlight aim incorrect or bulb failure

Fix: Replace headlight bulb or adjust aim

5.2

Lighting

Rear light or brake light failure

Fix: Replace bulb or repair wiring

5.3

Lighting

Number plate light not working

Fix: Replace number plate bulb

Cost breakdown

EUR 12-35

Wiper blades

Easy

EUR 8-30

Headlight bulb

Easy

EUR 35-95

Brake pads

Moderate

EUR 70-160 each

Tyres

Garage recommended

EUR 65-180

Suspension arm

Garage recommended

Fix difficulty

Easy

Small parts, low risk, usually under 30 minutes with basic tools.

Moderate

Needs mechanical confidence, safe lifting, and careful checks before driving.

Garage recommended

Safety critical, specialist tools, alignment, tyre fitting, or brake risk.

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