A Warrant of Fitness inspection in New Zealand covers more than 60 individual checkpoints across your vehicle's safety systems. Understanding what gets checked helps you prepare and avoid the cost and inconvenience of a failed WOF. Here is the complete breakdown of what NZTA-approved inspectors examine — and the items that catch Tauranga drivers out most often.
Tyres and Wheels
Every tyre must have at least 1.5mm of tread depth across three-quarters of the tread width and around the entire circumference. Inspectors also check for sidewall damage (cuts, bulges, cracking), correct tyre size matching the vehicle's specifications, and that tyres on the same axle are the same size and type. Mixing radial and cross-ply tyres on the same axle is an automatic fail. In Tauranga's wet winters, tread depth is critical for grip on Cameron Road, Takitimu Drive, and the winding roads through Welcome Bay.
Braking System
The brake inspection covers pad thickness, rotor condition, brake lines, hoses, and the handbrake. Pads must have at least 1.5mm of friction material remaining. Brake lines are checked for leaks, corrosion, and damage. The handbrake must hold the vehicle on a gradient without the footbrake applied. If your brakes are showing signs they need replacing, getting them done before the WOF saves you a re-inspection fee.
Steering and Suspension
Inspectors check for excessive play in the steering system — rack ends, tie rod ends, and the steering column. Suspension is tested for worn shock absorbers (a bounce test), damaged springs, cracked bushings, and compromised ball joints. CV boots are inspected for splits or tears. A split CV boot won't fail immediately but a CV joint with visible grease leaking will. Bay of Plenty's pothole-prone side streets in Greerton and Bethlehem accelerate suspension wear.
Lighting and Electrical
All lights must work: headlights (high and low beam), indicators (front, rear, side), brake lights, tail lights, number plate light, and reverse lights. Headlight aim is tested — lights pointing too high blind oncoming drivers and are an instant fail. Cracked or moisture-filled headlight lenses can also cause failure. This is one of the easiest WOF categories to check yourself before your appointment — walk around the car with the engine running and test every light.
Windscreen and Glazing
The windscreen must be free of cracks or chips in the driver's direct line of sight (Zone A — a 290mm wide strip centred on the steering wheel). Small chips outside this zone are generally acceptable if they don't impair vision. Wipers must clear the windscreen effectively without streaking or juddering. Wiper blades cost $15 to $30 and take two minutes to replace — there's no reason to fail a WOF on wipers.
Structure and Body
This is where many vehicles in coastal Tauranga fail. Inspectors check for structural rust in chassis rails, sills, subframes, floor pans, and mounting points for suspension and seat belts. Surface rust is acceptable; perforation (rust holes) in structural areas is not. Vehicles that have spent years near Mount Maunganui and Papamoa Beach are particularly susceptible to salt-air corrosion. A vehicle with structural rust may need panel replacement or professional rust repair before it can pass.
"The number one WOF surprise I see in Tauranga is structural rust. People bring in cars that look great on top but have rotten sills underneath. A quick check before the WOF saves the shock at the testing station." — Jens Ottesen, Your Local Garage
Exhaust and Emissions
The exhaust system must be leak-free and securely mounted. Visible exhaust smoke (blue for oil, black for rich fuel mix, white for coolant) can trigger a fail. Catalytic converters must be present and functional on vehicles that were originally fitted with them. Exhaust leaks near the engine bay are particularly dangerous as they can allow carbon monoxide into the cabin.
Seats, Seatbelts, and Safety
All seatbelts must retract properly, latch securely, and show no fraying or cuts. The driver's seat must lock in position and not rock or slide. Child restraint anchor points are checked for security. Door latches must hold firmly when closed and open from both inside and outside.
How to Prepare for a WOF
Before your WOF appointment, do a quick walkthrough:
- Test all lights — headlights, indicators, brake lights, reverse lights, number plate light
- Check your windscreen for chips in the driver's line of sight
- Test your wipers and top up washer fluid
- Look under the car for visible leaks or hanging components
- Check tyre tread with a tread depth gauge or the match-head test (1.5mm minimum)
- Test your handbrake on a hill
If anything needs fixing before the WOF, a mobile mechanic can handle most repairs on-site. Keeping up with regular servicing means fewer WOF surprises, because a good service catches the same items inspectors check.