Over 35% of NZ cars fail their WOF first time. Here’s exactly what gets checked, the most common reasons cars fail, and a pre-WOF checklist to help you pass first time.
Introduction
Getting your Warrant of Fitness doesn’t have to be stressful – but for a lot of Kiwis, it is. According to Waka Kotahi data, over 35% of vehicles fail their WOF on the first inspection. The frustrating part? Most of those failures are completely preventable with a few basic checks before you drive in.
This guide covers everything you need to know: what inspectors actually look at, the most common reasons cars fail, a pre-WOF checklist you can do yourself at home, and what to do if you fail.
Also, check out our other guides here:
- How Much Does a WOF Cost in NZ? (2026 Price Guide)
- WOF Repairs You Can Do Yourself (And What to Leave to a Mechanic)
What Gets Checked in a WOF
A WOF inspection covers all the safety-critical components of your vehicle. Here’s what the inspector will be looking at:
- Lights – headlights (dipped and full beam), brake lights, indicators, reverse lights, number plate light, and daytime running lights
- Tyres – tread depth (minimum 1.5mm), sidewall condition, tyre pressure, and matching sizes
- Brakes – brake pads, brake fluid, handbrake, and brake lines
- Steering and suspension – steering response, suspension components, wheel alignment
- Windscreen and wipers – cracks in the critical vision area, wiper blade condition, washer fluid
- Seatbelts – all belts must retract properly, buckle correctly, and show no fraying or damage
- Body and structure – rust in structural areas, doors, bonnet, and boot latches
- Exhaust – no leaks, no excessive smoke, securely mounted
- Fuel system – no leaks
- Glazing – all windows and mirrors intact and undamaged
After the inspection, the inspector is required to give you a written list of everything checked and whether it passed or failed.
The Most Common Reasons NZ Cars Fail Their WOF
Understanding what causes failures is the best way to avoid them. Here are the top five, in order:
- Lights (35%+ of failures): Lighting faults are by far the most common reason for a failed WOF in New Zealand. The problem is you can’t see your own rear lights while driving, so bulbs can blow without you realising. Indicators, brake lights, the high-stop brake light above your rear window, and the number plate light are all commonly missed.
- Tyres (approx. 28% of failures): Worn tyres are the second biggest cause of WOF failures. The legal minimum tread depth is 1.5mm across the full width of the tyre. A quick test: push a 20-cent coin into the tread groove. If you can read the full “20”, your tread is likely under 2mm and getting close to the limit. Inspectors also check sidewalls for bulges, cracking, and damage.
- Brakes (approx. 15% of failures): Worn brake pads, leaking brake fluid, a spongy pedal, or a poorly adjusted handbrake will all cause a failure. If you hear squealing or grinding when braking, get it looked at before your WOF.
- Steering and suspension (approx. 12% of failures): Loose steering, worn bushings, or a car that pulls to one side are all red flags. Uneven tyre wear is often a sign of suspension or alignment problems, worth checking if you haven’t had it looked at recently.
- Windscreen and wipers (approx. 10% of failures): A chip or crack in the critical vision area (directly in front of the driver) will fail. Wiper blades that streak or miss sections of the windscreen will also fail, and it’s one of the cheapest fixes you can make.
Your Pre-WOF Checklist
Run through this before you book your WOF and you’ll significantly improve your chances of passing first time.
Lights: Get someone to help you and walk around the entire car with the engine running. Check: headlights (both dipped and full beam), brake lights, indicators front and rear, reverse lights, hazard lights, number plate light, and the high-stop brake light.
Tyres: Check tread depth on all four tyres using the 20-cent coin test. Look at the sidewalls for bulges, cracks, or cuts. Check tyre pressure — under-inflated tyres are a common issue.
Windscreen and wipers: Look for chips or cracks in your direct line of vision. Run your wipers and washer fluid – blades should clear the screen cleanly with no streaking. Top up your washer fluid bottle.
Brakes: Check your brake fluid level. Apply the handbrake firmly – it should hold. If your brake pedal feels soft or you hear any unusual noises when braking, get it inspected first.
Seatbelts: Pull all seatbelts out fully, check for fraying or cuts, and make sure they retract smoothly and buckle properly. Check every seat, not just the driver’s.
Under the car: Have a quick look underneath for any obvious rust, especially around the chassis rails and suspension mounting points. Rust within 150mm of a brake mounting point is an automatic failure.
Exhaust: Start the engine and listen for any rattling or blowing sounds. Look for smoke – blue smoke means burning oil, black means fuel issues, white can indicate coolant problems.
How Often Do You Need a WOF?
Your WOF frequency depends on when your vehicle was first registered:
- Vehicles first registered less than 3 years ago – WOF required at 3 years old, then annually
- Vehicles registered after 1 January 2000 – annual WOF
- Vehicles registered before 1 January 2000 – WOF every 6 months
If you’re unsure, check the sticker on the inside of your windscreen or look up your plate on the Waka Kotahi website.
What Happens If You Fail?
Failing a WOF isn’t the end of the world. Here’s what you need to know:
- The inspector must give you a written list of everything that failed
- You have 28 days to get the repairs done and return for a free recheck, but it must be at the same inspection organisation (or a different site within the same chain)
- You can only drive the vehicle after a failed WOF for the purpose of getting it repaired or re-inspected, and only if it’s safe to do so
- Driving with an expired WOF can result in a fine of up to $200, and your insurance may be affected in the event of an accident
2026: What’s Changing?
There are proposed changes to the WOF system currently under consultation. The key one to be aware of: if your car has advanced driver assistance systems (ADAS) like automatic emergency braking, lane keep assist, or lane departure warning, there is a proposal that these systems would need to be working – no warning lights active – in order to pass. This isn’t law yet, but it’s worth knowing if you’ve had a recent windscreen replacement and your ADAS camera hasn’t been recalibrated.
The WOF frequency and core inspection requirements remain the same for 2026.
Ready to Book Your WOF?
Now that you know what to check, the next step is finding a WOF station near you. Use WOF Near Me to search by suburb — you can filter by price, walk-ins welcome, and waiting area availability so you can find a garage that works for you.
If you want a 2026 guide on how much a WOF costs, click here: How much does a WOF cost in NZ?