A warranty is a promise, not a guarantee. What it covers, when an independent workshop is safe, how extended cover differs and what right to repair changed.
Not automatically. In the United States some warranties demand authorised repairs, but under the Magnuson-Moss Act owners can choose their own repairer when the warranty does not pay for labour, and the FTC calls blanket voiding threats deceptive unless the maker provides free service or parts. Other countries set their own rules.
In April 2018 the United States Federal Trade Commission warned six manufacturers, the carmaker Hyundai among them, that telling buyers a warranty is void if they use third-party parts or independent repairers may be a deceptive practice. The question underneath is whether servicing elsewhere ends your cover.
The rules described here are American, and other countries define their own.
What does a car warranty actually promise?
In contract law a warranty is an assurance, typically from a seller to a buyer. It is a promise and not a guarantee, so if it turns out to be untrue the buyer's usual remedy is damages. A manufacturer can also warrant to a buyer it has never contracted with, because the car was bought through an intermediary such as a dealer.
Warranties are either express or implied. An express warranty is stated, typically in writing, and for it to exist the statement must have played a part in the buyer's decision to purchase. An implied warranty is unwritten and arises from the nature of the deal. New goods are commonly sold with an implied promise that they are as advertised, while used goods may be sold as they are, with no warranty at all. Each country decides the details for itself.
The commonest promise on a manufactured product is freedom from defects in materials and workmanship. That is a statement about how the thing was built, not about how long it will last. A time limit then fixes the window in which a claim can be made.
A warranty is a promise, not a guarantee, and in the United States the test regulators apply to servicing is whether the maker is paying for the work.
What is the difference between a time limit and a performance promise?
A time-limited warranty says the product was delivered free of defects and gives the buyer a set period in which to prove otherwise. A performance warranty promises that the product will keep working for that period. They sound alike, and the effect is often similar, since the usual proof that something was defective is that it later broke.
The two come apart when the time limit is longer than the product's natural life. Imagine a coat designed to last two years with a 10-year warranty against defects. Worn out after three years, it earns no claim. But if the buyer starts wearing it five years after purchase and it fails a year later, a defects warranty would still respond in year six. A 10-year performance warranty would instead promise the coat lasts for the full decade.
What do US implied warranties say about cars and tyres?
Under Article 2 of the Uniform Commercial Code, two warranties are implied unless a seller explicitly disclaims them, for instance with the phrase "as is". One is merchantability: the goods must reasonably meet an ordinary buyer's expectations. The other is fitness for a particular purpose, which applies when a buyer relies on the seller to choose goods for a specific need.
The code's own example is a motoring one. A buyer asks a mechanic for tyres to use on snowy roads and is sold tyres that are unsafe in snow. That breaches the fitness warranty.
Disclaimers often blunted these protections, so a federal law, the Magnuson-Moss Warranty Act, set out to bolster warranties on consumer goods. It dates from 1975, though one provision is cited as the Act of 1976. Under it, a seller who offers an express warranty can no longer disclaim the implied ones, and a buyer who wins may recover attorney fees. It also provides for enforcing a satisfaction guarantee, where the advertiser must refund the full price whatever the reason for dissatisfaction. Some states add lemon laws that apply specifically to motor vehicles.
Time limits apply to claims. The Uniform Commercial Code sets four years, which a contract can shorten to one, running from delivery or, where future performance is guaranteed, from discovery of the problem. A seller may honour a warranty with a refund or a replacement, and refusing to honour one may be an unfair business practice.
Does servicing elsewhere void your warranty?
Not automatically. Some warranties require repairs by an authorised service provider, and work by anyone else can nullify them. But under the Magnuson-Moss Act, where a warranty does not pay for labour, the owner chooses who does the work, do-it-yourself repairs included, and the company must still provide all the parts needed at no charge.
The FTC pushed the same point in April 2018, writing to Hyundai, Asus, HTC, Microsoft, Sony and Nintendo. Its view was that telling consumers a warranty is void if they damage a warranty sticker or seal, fit third-party replacement parts or use a third-party repairer is deceptive, because such terms hold only when the manufacturer is providing free warranty service or parts. Sony and Nintendo both issued revised warranty statements afterwards.
In both statements the test is the same: is the manufacturer actually providing free warranty service or parts? Where it is, authorised-repair conditions are in play. Where it is not, the owner's choice of repairer stands.
Manufacturer warranty vs extended warranty: what is the difference?
| Type | Where it comes from | Scope and limits |
|---|---|---|
| Manufacturer warranty | Given with the new product | Usually a promise of freedom from defects in materials and workmanship, often time limited |
| Extended warranty | Sold by third parties or manufacturers as a service contract | Extends cover for a further period on terms that may not match the original |
| Implied warranty | Arises from the nature of the sale | Merchantability and fitness for purpose in the US, unless disclaimed with wording such as "as is" |
Extended warranties deserve close reading. They may cover nothing beyond mechanical failure from normal use, and typical carve-outs are business use, natural disasters, mistreatment by the owner and deliberate damage. Parts that normally wear out, such as tyres and lubrication, may be left out as well.
Who stands behind the promise matters too. Warranties sold through retailers can carry a significant commission for the retailer. A warranty sold at a car dealership may be subcontracted, with repairs paid at lower rates, a squeeze that could undermine how well the car is looked after. At the time of repair, the owner may face charges for unexpected work or uncovered parts. The risk itself usually sits with underwriters, who insure the provider back to back.
What is the right to repair?
It is the legal right of owners to maintain, repair or modify what they buy, from cars to phones to farm equipment. Campaigners say it is blocked by requirements to use only the manufacturer's service, limits on access to tools and parts, and software barriers that together amount to a repair monopoly.
Repair monopolies have been found to bring higher prices, longer delays, reduced serviceability and less choice. Supporters of the right to repair point to affordability, sustainability and the availability of critical supplies in a crisis. They set out four tests for a product: it should be designed so repairs are easy, owners and independent repairers should reach spare parts and tools on fair terms, software should not hinder repair, and the manufacturer should say plainly how repairable the thing is.
The movement began with cars and then spread. Debate widened to electronics once smartphones and computers became universal, and broken or used devices became the fastest growing waste stream. The Economist cites a sense of moral justice or property rights behind the idea that owners should be able to fix what they own. Campaigners fighting planned obsolescence add that repair can cost more than replacement when the maker keeps a monopoly on the work.
Software now sits at the centre. Parts pairing, or serialisation, stops a part being swapped without a password that manufacturers give only to preferred technicians. Approved parts can raise the repair bill, and some owners respond by upgrading sooner.
How did carmakers come to control repair?
The car industry led the way. From the 1910s Ford set up certified dealerships and service networks to promote its own parts over those of independent shops, and pushed for flat fees even across different repairs. Annual model changes, a strategy Alfred P. Sloan of General Motors pursued at scale and Ford had adopted by 1933, made it harder for independents to stock the right parts.
Independent repairers did win some ground in court. In 1947 a business owner reselling refurbished spark plugs under a trademarked name was sued, and the resulting Champion Spark Plug case helped establish the right to resell repaired items so long as they are labelled correctly. FTC rules on terms such as rebuilt and remanufactured followed.
Electronics raised the stakes. The electronic share of a car's bill of materials climbed from 5% in the 1970s to over 22% by 2000, and hybrids brought special tools that makers shared only with authorised repairers. In the first years of the 2000s the car industry saw off the first right-to-repair bill aimed at it. An industry-backed directory of manufacturer information and tools went online in 2001, yet a Terrance Group study found roughly 59% of independent repairers still had trouble obtaining diagnostic tools and parts.
What has changed for car owners?
Massachusetts passed the first US right-to-repair law for cars in 2012. It obliged manufacturers to make available to consumers and independent mechanics the service materials and diagnostics that had been exclusive to dealerships. In January 2014 major trade organisations signed a Memorandum of Understanding built on that law, extending it to all 50 states from the 2018 model year.
Copyright law pulled the other way. The 1998 Digital Millennium Copyright Act bars repairs that involve software unless an exception is granted, and it has been used to block them. In 2018 the exemption allowing software changes on land-based motor vehicles was widened so owners could hire third parties, and the Library of Congress extended it again in 2021 recommendations covering automobiles, boats, agricultural vehicles and medical equipment.
Where this goes next
The campaign keeps widening. In farm and heavy equipment, a 2018 statement of principles from equipment makers and their dealers drew media backlash in January 2021 because the promised means of making complete repairs were not visibly available.
Beyond cars, the European Parliament approved recommendations in July 2017 that member states give consumers a right to repair electronic goods, within an update of its Ecodesign Directive of 2009. In March 2019 Senator Elizabeth Warren, as part of her presidential campaign, said she intended to introduce legislation affirming the right to repair farm equipment, potentially expanding it to other electronic devices.
