Buying a car from a registered dealer in New Zealand gives you much stronger consumer protection than buying privately, whether you buy online, at a car yard, or at a dealer auction. The law assumes the dealer knows what they are selling, so a string of legal safeguards sits behind every sale. The catch is that most buyers never learn what those rights are until something goes wrong. This guide walks through the laws that protect you, the Consumer Information Notice every used car must display, how to make sure there is no money owing on the vehicle, the myth of buying a car as is where is, and exactly what to do if the car turns out to be faulty. It is general information to help you shop with confidence, not legal advice. One more thing worth doing before you sign: line up your finance. Dealers often present their own finance as the easy option, and it can be, but it is rarely the cheapest. Comparing your options first can save you real money over the life of the loan.
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Why buying from a dealer protects you more than buying privately
The single biggest difference between buying from a dealer and buying privately is the law that sits behind the sale. When you buy from a registered motor vehicle trader, three pieces of legislation protect you: the Consumer Guarantees Act 1993, the Fair Trading Act 1986, and the Motor Vehicle Sales Act 2003. A private seller is not running a business, so most of these protections do not apply to a private sale.
In practical terms, that means a dealer cannot simply wash their hands of the car once you drive off the lot. They are legally responsible for the vehicle being of acceptable quality, for telling you the truth about it, and for giving you a remedy if it is not as it should be. A private seller, by contrast, generally only has to not actively lie to you.
This is why it pays to know whether you are dealing with a genuine dealer. Anyone who sells more than six vehicles, or imports more than three vehicles, in any 12 month period is treated as a motor vehicle trader and must be registered. Some sellers try to disguise a trading business as a string of private sales precisely to dodge these obligations, so the registration check below matters.
Check the dealer is registered (and not banned)
Every motor vehicle trader in New Zealand must be registered on the Motor Vehicle Traders Register, which is run by the Ministry of Business, Innovation and Employment (MBIE). Trading without being registered, when registration is required, is an offence and can attract significant fines.
Before you commit, search the public register at motortraders.govt.nz to confirm the business and its registration number. You can also ask the dealer to show you their registration certificate, which lists their trader number and expiry date. A reluctance to provide it is a warning sign.
The same site also lists banned traders: people and companies who have been prohibited from working in the motor vehicle trade, often after serious or repeated breaches of the law. A banned person is not allowed to work in vehicle trading in any role, including as a salesperson, so it is worth a quick check.
Buying from a registered trader matters for another reason: only purchases from a registered trader (or from a seller who should have been registered) can be taken to the Motor Vehicle Disputes Tribunal, which is the specialist body for car disputes. Buy from a genuine private seller and that door is closed to you.
Your rights under the Consumer Guarantees Act
The Consumer Guarantees Act (CGA) is the workhorse of your protection. When you buy from a dealer, the car comes with a set of automatic guarantees that the dealer cannot take away.
Acceptable quality: the vehicle must be of acceptable quality. That means it should be safe, durable, free of minor defects, and as reliable as a reasonable buyer would expect, taking into account the price, the age and mileage, and anything the dealer told you. A 15 year old car with 200,000 km is held to a different standard than a near new one, but both must be safe and reasonably reliable for what they are.
Fit for purpose: if you told the dealer what you needed the car for, towing a boat, for example, or a long highway commute, it must be reasonably fit for that purpose.
Matches its description: the car must match how it was described to you, whether in the advertisement, on the Consumer Information Notice, or in conversation.
A current warrant of fitness does not override these guarantees. A WoF is a snapshot of certain safety items on the day it was issued. It is not a guarantee of mechanical reliability, and a car can pass a WoF while still failing the acceptable quality test under the CGA.
Importantly, there is no fixed expiry on these rights. The CGA does not set a hard deadline, because acceptable quality is measured against what is reasonable for that vehicle. A serious engine fault that appears shortly after a short warranty ends can still be covered, because a reasonable buyer would not expect a major component to fail that soon.
As is where is does not cancel your rights
One of the most common and costly misunderstandings is the phrase as is where is. Many buyers assume it means they are buying the car with no comeback, faults and all. That is not how it works when you buy from a registered dealer.
A dealer cannot contract out of the Consumer Guarantees Act for an ordinary consumer sale. Labelling a car as is where is, or asking you to sign a waiver, does not strip away your right to a car of acceptable quality. Those guarantees apply by force of law, and any attempt to remove them is generally ineffective and can itself breach the Fair Trading Act.
There are narrow situations where buying with known faults is genuine, for example a clearly damaged car sold cheaply with the specific defects spelled out and accepted. But a blanket as is where is sticker on a normal used car for a normal price does not let a dealer escape responsibility. If a salesperson tells you that signing here means you give up all your rights, treat that as a red flag.
The Consumer Information Notice: what it must tell you
If you are buying a used vehicle from a registered dealer, the law requires an accurate and complete Consumer Information Notice (CIN) to be attached to the car. If the car is advertised online, the CIN information must appear in the listing. New vehicles do not require a CIN.
The CIN exists so you can make an informed decision. It must disclose key details, including the trader's name, address, and registration number; the year of manufacture, make and model, and engine capacity; the odometer reading; the cash price including GST; whether there is any registered security interest (money owing); and history information such as whether the vehicle was imported damaged. The reverse side summarises your consumer rights.
You and the dealer should both sign the CIN, but do not sign until you have read it and checked the details against the car and its documents. Once you have signed it, the dealer should give you a copy to keep.
If a used car on a dealer's lot has no CIN, that is a breach. The Commerce Commission can issue an infringement notice or prosecute, and traders face fines for failing to display one. A missing CIN is both a legal problem for the dealer and a practical warning sign for you.
Money owing on the car: the security interest check
This is the single most important box on the Consumer Information Notice, and the one buyers most often overlook. Cars are frequently bought on finance, and that finance is registered as a security interest against the vehicle on the Personal Property Securities Register (PPSR). If there is money still owing, the finance company has a claim over the car itself.
Look for the security interest section on the CIN. If it indicates money is owing, do not buy the car until that is resolved. As an extra safeguard, you can run your own PPSR check using the registration plate or VIN, which costs only a few dollars and shows any registered security interest independently of what the dealer tells you.
There is an important protection if a dealer gets this wrong. If the CIN does not disclose a security interest, but it later turns out money was in fact owing, you generally take the car free of that security interest. The finance company cannot repossess the car from you, and must instead pursue the dealer who failed to disclose it. This is a strong reason to insist on a complete, accurate CIN and to keep your signed copy.
Honesty in the sale: the Fair Trading Act
The Fair Trading Act 1986 makes it illegal for a dealer or salesperson to mislead or deceive you, whether by what they say, what they write, or what they leave out. This covers the price, the car's quality and features, its history, the odometer reading, and any discounts or special offers. Everything they tell you must be accurate.
A few classic traps the Fair Trading Act helps you challenge: odometer tampering, sometimes called clocking, where the displayed mileage is wound back (a vehicle history report will usually expose inconsistent readings); inflated trade-in or cash-back offers, where a generous sounding allowance is quietly recovered through a higher purchase price; and sales patter that talks down your legal rights.
Because verbal promises count too, keep a paper trail. Save the advertisement, take screenshots of the online listing, and note any specific assurances a salesperson makes. If the car does not live up to what you were told, that evidence is what turns a he-said-she-said dispute into a claim you can actually win.
Before you accept dealer finance, compare your options
Dealers often present their own finance at the point of sale as the simple, sign-here option. It is convenient, and sometimes it is competitive, but dealer arranged finance frequently carries a margin: the lender pays the dealer a commission, and the rate you are offered can be marked up above what you might secure elsewhere. Over a three to five year loan, even a small difference in the interest rate adds up to a meaningful amount of money.
The fix is simple: sort your finance before you fall in love with a car, so you walk in knowing what you can borrow and at what cost. That also strengthens your hand, because you are negotiating the car price separately from the loan rather than letting the dealer bundle both together.
This is where a broker can help. Udrive is a New Zealand finance broker that compares car loan options from a panel of lenders, so you can see how the numbers stack up before you accept whatever the dealer puts in front of you. We do not promise approval or skip the lender's checks, and every application is assessed on its merits, but comparing first means you make the finance decision on your terms.
What to do if the car turns out to be faulty
If a problem appears and it breaches one of the Consumer Guarantees Act guarantees, you have the right to a remedy. The first step is almost always to contact the dealer promptly, in writing, describing the fault and the date and odometer reading when it appeared. Keep copies of everything.
For a fault that can be put right, the dealer is generally entitled to repair it within a reasonable time. If the dealer refuses, drags their feet, or the fault is serious enough to be a substantial failure, you may be able to reject the car and ask for a refund or replacement. Because the right to reject is time limited, act quickly rather than waiting and hoping it sorts itself out.
If the dealer is a member of the Motor Trade Association, free mediation may be available. If that does not work, you have two formal options. The general Disputes Tribunal handles smaller consumer claims, while the specialist Motor Vehicle Disputes Tribunal (MVDT) is purpose built for car disputes against registered traders.
The MVDT, part of the Ministry of Justice, can consider claims that a dealer breached the Consumer Guarantees Act or the Fair Trading Act. It currently costs $87 to file a claim (the fee is non-refundable), and it can deal with disputes up to $100,000, or more if both parties agree in writing. It covers vehicles with a gross weight under 3,500 kg, and it only applies to purchases from a registered trader. After you file, the trader is given an opportunity to discuss and settle with you (around 14 days) before a hearing is arranged. As the person making the claim, it is your job to prove it, so bring your CIN, the advertisement, repair quotes, and your chronology of events.
A quick checklist before you sign
Confirm the seller is a registered trader on motortraders.govt.nz, and check they are not on the banned traders list.
Read the Consumer Information Notice in full, and check the security interest section shows no money owing. Run your own PPSR and vehicle history check to be sure.
Match the VIN on the CIN to the VIN stamped on the car and in its documents, and look for any mismatch between the odometer reading and the car's general wear.
Get an independent pre-purchase mechanical inspection. A current warrant of fitness is not a guarantee of reliability.
Keep the advertisement, the signed CIN, and any written promises. Do not pay a non-refundable deposit if you can avoid it.
Sort and compare your finance before you commit, so the dealer's offer is one option you are weighing up, not the only one.
This guide is general information, not financial advice. Any finance is provided by a lender and is subject to lender criteria, affordability, and responsible lending checks. Approval is never guaranteed.