How to Read Your NCT Report: Every Section Explained

What you receive

After every NCT (pass or fail) you get a Vehicle Inspection Report (VIR). It can be sent electronically by email (preferred — keep a digital copy) and is printed at the centre if you fail. The VIR lists every item tested, the result for each, any defects found, and the overall outcome. It's a useful document — at resale, a buyer who sees a clean run of NCT VIRs has far more confidence in the car than one without.

The format is standardised by the Road Safety Authority and operated by Applus (the NCTS contractor), and aligns with EU Directive 2014/45 categories.

The 4 possible overall results

When you log your result in odo.ie, the new NCT due date auto-rolls — you don't have to remember to calculate it.

The three fail tiers — Minor / Major / Dangerous

Under EU Directive 2014/45, every failed item is rated by severity:

The re-test process

• 30 days to get re-tested after a fail
• If re-test happens within 30 days: only the failed items are re-tested
• Exceeding 30 days: full new NCT required (full €60 fee)
• Re-test fee with equipment (gas test, headlight beam-setter, brake performance, suspension tester): €40
• Re-test visual-only (visible defects, light bulbs, wiper blades, plates etc.): FREE
• Bring the original VIR — tells the inspector exactly what to verify
• Visual-only re-tests don't need a new appointment — visit during open hours

Fees (April 2026)

Always confirm current fees at ncts.ie before booking — fees occasionally change with annual reviews.

The OBD test

OBD = On-Board Diagnostics. Plugged into the OBD port (under the steering wheel or in the glovebox), the tester reads error codes from your car's computer.

• Phase 1 (June 2021): OBD errors gave Pass Advisory only — no failure
• Phase 2 (since May 2023): certain OBD errors are now FAILS — engine and emissions related are the main targets

Common OBD fail codes

• P0420 — Catalytic converter efficiency below threshold
• P0130-series — Oxygen / lambda sensor malfunction
• P0300-series — Misfire detection
• P0400-series — EGR system fault
• MIL on — Engine check light illuminated indicates an active fault

The 62 testable items (categorised)

The NCT examines roughly 62 distinct items across multiple systems. Your VIR shows the result for each. Categories:

The most common NCT failures (Applus data)

Visual defects

• Tyres — uneven wear, cracks, low tread, age 6+ years
• Front suspension — worn shocks, leaking dampers, bushings
• Brakes — worn pads, leaking lines, corroded components
• Steering components — worn track rods, ball joints
• Bodywork corrosion — especially in structural areas (sills, mounting points)

Non-visual / equipment-detected

• Headlight aim — beam direction off (the #1 non-visual fail)
• Brake performance — uneven braking, weak handbrake
• Emissions — too high CO / HC for the fuel type
• Suspension efficiency — worn shocks identified by suspension tester
• OBD codes — engine-management faults (Phase 2)

For pre-test preparation see our Pass the NCT First Time guide.

Reading specific report codes — examples

Each defect on your VIR includes the item number, the short description, and the fail tier (X1 / X2 / X3) or advisory note. Match the item number against your VIR and ask any garage what the specific repair will be.

What to do with the report — step by step

Step 1 — Don't panic

• About 50% of cars fail the NCT first time — you're not unusual
• Re-test pass rate is over 90%
• Most failures are fixable in days, not weeks

Step 2 — Read carefully

• Note every Major or Dangerous item
• Note Pass Advisory items — fix when convenient (not for the re-test, but for next year)
• Identify which items need test equipment to re-verify (gas test, headlight aim, brake performance, suspension)

Step 3 — Plan repairs

• For Dangerous items: arrange recovery to garage (don't drive)
• For Major items: book garage promptly to stay inside the 30-day window
• For Minor items: still need fixing for the re-test
• Get an itemised written quote before authorising work

Step 4 — Choose a garage

• SIMI-member garages preferred — see our Find a Good Garage in Ireland guide
• Get an itemised written quote
• Ask whether they can also adjust headlight aim (most have the equipment)
• Some will offer a post-repair pre-NCT check to confirm the fix

Step 5 — Book the re-test

• Within 30 days of the original test
• If repair will take longer, plan for a full new NCT
• Bring the original VIR to the re-test
• Visual-only re-tests don't need a new appointment — drive in during open hours

Step 6 — After passing the re-test

• Receive new NCT certificate (paper); display on windscreen
• Log in odo.ie — auto-rolls next due date
• Keep VIR records for resale and for buyer reference

Common fail items + approximate repair costs

See our Car Tyres in Ireland guide for tyre-specific pricing context (legal limits, age guidance, 2026 prices).

The 90-day window — strategic tip

• You can take your NCT up to 90 days BEFORE the due date without affecting expiry
• Why this matters: gives you a buffer if you fail and need to fix
• Strategy: book NCT 60–90 days before expiry — pass = no impact on existing certificate; fail = time to repair without ever driving on expired NCT
• Booking last-minute is the single most common reason drivers end up driving on lapsed cover after a fail

Driving on expired NCT — penalties

• 3 penalty points + €60 FCN if paid within 28 days
• €90 if paid 28–56 days
• Court appearance if not paid: 5 penalty points + court-ordered fine + theoretically up to 3 months prison
• Insurance: technically, driving on expired NCT may invalidate cover. Insurance Ireland has indicated members will be “pragmatic” given booking delays in recent years, but this is not a guarantee — never rely on it
• Set up odo.ie reminders (30 / 14 / 7 / 1 day) so you never miss the due date

What's coming

• More OBD-based testing as cars become more complex
• EV-specific testing as the fleet electrifies (high-voltage isolation, battery-management warnings)
• Continued focus on emissions (DPF, urea systems on diesels)
• Stricter brake-performance standards under updated EU directives
• More automated reporting / electronic VIR delivery

FAQ