VIN

Where the VIN actually is on the car

Check more than one location, because agreement between them is the thing you are testing.

The most common visible spot is the base of the windscreen on the driver's side, readable from outside the vehicle looking down through the glass. There is usually also a plate or sticker in the driver's door opening, visible when the door is open. Beyond that, VINs are stamped into structural metal — under the bonnet, on a strut tower, on a chassis rail, or under carpet or trim in the footwell or boot, depending on the manufacturer.

The VIN also appears on paperwork: registration documents, insurance records, service history and import documentation.

Older vehicles and vehicles without one

VINs are a standardised, relatively modern idea. Plenty of vehicles on New Zealand roads were built before the standard existed and carry a chassis number instead, which does the same identifying job for records from that period. Where a vehicle enters the New Zealand system without a usable identifier, one can be assigned as part of the certification work so that the register has something unique to key to.

You do not do this yourself. It is handled through the certification process that sits in front of registering a vehicle, and it is one of the reasons that process is more involved than people expect for an old import or a rebuilt vehicle.

What a VIN gets you, and what it does not

Run a VIN or a plate through a vehicle check and you get what the vehicle register holds: identity, basic specifications, licensing status, inspection status. That is real information and it is free to look at.

Three important things sit outside it.

Money owing is on the Personal Property Securities Register, run by the Companies Office rather than the transport agency. It is a separate search and it is the one that protects you from a repossession you did not see coming.

Damage and write-off history is a third question again, usually answered by a paid history report and by physical inspection. A vehicle that has been repaired and returned to the road may look entirely ordinary on the register — what happens when a vehicle is written off explains why the register does not automatically know about an insurer's decision.

And overseas history, for an import, is not in the New Zealand register at all. If the vehicle spent ten years somewhere else, ten years of its life sit in a system nobody here queries as a matter of course.

When the plate has changed

This is the situation the VIN exists for.

Say you are looking at a car advertised as one careful owner. You search the plate, you find nothing troubling, and you feel reassured. But the plate is eight months old — either a personalised combination fitted last year, or a replacement set issued after a theft, or plates issued when the vehicle was brought back onto the register. Everything before that point is attached to a plate number you have never seen and did not search.

The VIN does not have that gap. Any history keyed to the vehicle itself — recalls, imports, certification, previous records — resolves through the VIN regardless of what is bolted to the bumper today.

The same logic applies to reregistration. A vehicle whose registration was cancelled and later restored is, from the plate's point of view, a new arrival. From the VIN's point of view it is the same vehicle it always was, with whatever happened during the gap still attached to it.

The one-line version

Write down the VIN, not the plate. Quote the plate to a mechanic and to a parts counter, because that is what people use in conversation. But when the question is "what is the truth about this vehicle", the plate is a nickname and the VIN is the name.