What to Check Before Your WOF in NZ

Your vehicle’s Warrant of Fitness (WOF) is a legal requirement in New Zealand. Failing it can mean costly repairs and inconvenience. A little preparation can save you time, money, and stress. This guide walks you through what to check before your WOF, so you can budget effectively and avoid surprises.

We’ll cover key areas to inspect, common failure points, and practical tips to help you pass first time. Remember, a WOF is not a full mechanical check — it’s a minimum safety standard. Keeping your car well-maintained year-round is the best way to avoid failures.

Why Checking Before Your WOF Matters

A failed WOF means you’ll need to get the issues fixed and pay for a re-inspection within 28 days. That can add up fast. Common failures like worn tyres or faulty lights are often easy to spot and fix yourself. By checking these beforehand, you can budget for parts or labour and avoid extra fees.

the NZ Transport Agency (NZTA), around 40% of WOF inspections result in a fail. Many of these are for minor, preventable issues. A quick pre-check can save you hundreds of dollars in re-inspection costs and keep your car safe on the road.

Step-by-Step Guide: What to Check Before Your WOF

1. Lights and Indicators

Check all lights are working: headlights (low and high beam), tail lights, brake lights, indicators, hazard lights, and number plate lights. Ask a friend to help or use a reflective surface. Burnt-out bulbs are cheap to replace but will cause an instant fail.

  • Test headlights for both beams.
  • Check brake lights by pressing the pedal while looking in a mirror.
  • Ensure indicators flash at the correct rate — too fast or too slow can mean a blown bulb.

2. Tyres

Tyres are one of the most common WOF failures. Check the tread depth — it must be at least 1.5mm across the central three-quarters of the tyre. Look for cuts, bulges, or uneven wear. Also check tyre pressure and ensure the spare tyre (if carried) is legal.

  • Use a tread depth gauge or the 20-cent coin test: insert a coin into the tread — if the tread doesn’t reach the rim, it’s too shallow.
  • Inspect sidewalls for cracks or bubbles.
  • Make sure all four tyres are the same type and size.

3. Windscreen and Wipers

The windscreen must be free of cracks or chips larger than 10mm in the driver’s line of sight. Outside that area, chips must be under 40mm. Wiper blades should clear the glass without smearing. Also check the washer fluid level — it must spray effectively.

  • Clean the windscreen inside and out before the inspection.
  • Replace wiper blades if they leave streaks.
  • Top up washer fluid with a suitable cleaner.

4. Brakes

Brakes are critical for safety. Listen for squealing, grinding, or a soft pedal. If you feel vibration when braking, the rotors may be warped. A WOF inspector will check brake performance, so if you suspect an issue, get it checked beforehand.

  • Test the handbrake on a hill — it should hold the car securely.
  • Check brake fluid level and top up if needed.
  • If the brake warning light is on, address it before the WOF.

5. Suspension and Steering

Bounce each corner of the car — if it keeps bouncing after you stop, the shock absorbers may be worn. Check for unusual noises when turning or driving over bumps. Steering should be smooth with no excessive play.

  • Look for leaking fluid from shock absorbers.
  • Check that the steering wheel is centred when driving straight.
  • Inspect tyres for uneven wear, which can indicate suspension issues.

6. Exhaust System

The exhaust must be secure and free of leaks. A loud or rattling exhaust may fail. Check for rust or holes in the muffler and pipes. If you notice fumes inside the car, get it checked immediately — it’s a safety hazard.

  • Listen for unusual noises when the engine is running.
  • Check that the exhaust is not touching any part of the body.
  • Ensure the catalytic converter (if fitted) is present and intact.

7. Seatbelts

All seatbelts must be in good condition and retract properly. Check for fraying, cuts, or damage. Ensure the buckles click in securely and release easily. The number of seatbelts must match the number of seats.

  • Test each seatbelt by pulling it fully out and letting it retract.
  • Check that all seats have a functional seatbelt.
  • Look for any warning lights related to airbags or seatbelt systems.

8. Body and Structure

Rust or damage that affects the structural integrity of the car can cause a fail. Check for large holes, sharp edges, or corrosion near suspension mounts. Minor cosmetic issues are usually fine, but serious rust is not.

  • Inspect the underbody for rust or damage.
  • Check that doors, boot, and bonnet open and close properly.
  • Ensure the bonnet latch works securely.

9. Mirrors and Glass

All mirrors must be present and not cracked. The rear-view mirror must give a clear view to the rear. Side mirrors must be adjustable. Check that all glass is free from cracks or chips that could impair vision.

  • Clean mirrors and glass for a clear view.
  • Adjust mirrors to the correct position.
  • If a mirror is broken, replace it before the WOF.

Key Concepts Explained

What Does a WOF Cover?

A WOF checks the vehicle’s safety systems, not its general condition. It covers lights, brakes, tyres, suspension, steering, seatbelts, windscreen, wipers, exhaust, and body structure. It does not check engine performance, oil levels, or transmission condition.

How Often Do You Need a WOF?

Most vehicles need a WOF every 12 months. However, cars over six years old require a WOF every six months. New vehicles don’t need a WOF for the first three years (unless used commercially). Check your vehicle’s specific requirements on the NZTA website.

What Happens If You Fail?

If your car fails, you’ll get a list of faults. You have 28 days to get them fixed and return for a re-inspection. The re-inspection is usually cheaper than the full check. If you don’t fix the issues within 28 days, you’ll need a full WOF again.

Tips to Save Money and Time

  • Do a pre-check yourself — use a checklist like this one to catch obvious issues.
  • Book in advance — avoid last-minute rush and choose a reputable garage.
  • Ask about re-inspection fees — they vary, so compare before booking.
  • Keep a maintenance log — regular servicing reduces the risk of failure.
  • Consider a free WOF check — some tyre shops or mechanics offer free checks for certain items.

Final Verdict

A WOF is a simple safety check, but failing it can disrupt your budget and daily life. By spending 30 minutes checking the key areas listed above, you can catch most common issues and avoid re-inspection fees. Regular maintenance is the best way to ensure your car stays safe and roadworthy year-round.

If you’re unsure about any item, ask a mechanic for a quick opinion. Many garages offer free or low-cost pre-WOF checks. That small investment can save you a lot more in the long run.