An express warranty is a specific factual promise, description, sample, or model a seller uses when selling a product, and it becomes a binding part of the deal. If the product doesn’t match what was promised, the buyer can demand repair, replacement, or money damages. Under the Uniform Commercial Code, the seller doesn’t have to say the word “warranty” or “guarantee” for one to exist. Federal law layers additional rules on top when the warranty is written down for a consumer product.
How an Express Warranty Is Created
The UCC recognizes three ways an express warranty comes into being. A seller can make an affirmation of fact or a promise about the product, such as telling a buyer that a laptop battery lasts ten hours on a charge or that a paint resists mold. A seller can describe the goods, so listing a shirt as “100% cotton” or advertising a television as 4K commits the seller to deliver goods matching those specifications. Or a seller can show a sample or model, in which case the shipment must conform to what the buyer inspected.1Legal Information Institute. Uniform Commercial Code 2-313 – Express Warranties by Affirmation, Promise, Description, Sample
None of this requires special language. A seller who never uses formal warranty words still creates one the moment they make a factual claim that becomes part of the basis of the bargain. What matters is what was communicated, not whether the seller thought of it as a legal commitment.1Legal Information Institute. Uniform Commercial Code 2-313 – Express Warranties by Affirmation, Promise, Description, Sample
Advertising is included. A factual claim in a brochure, product listing, or commercial can create an express warranty just as easily as a statement made face-to-face. A manufacturer’s website claiming a blender “crushes ice in under 10 seconds” carries the same weight as a salesperson saying it in the store.
What Doesn’t Count: Puffery and Opinion
Not every positive statement becomes a warranty. Vague opinions and sales exaggeration fall into a category called puffery, which the law treats as non-binding. Saying a mattress offers “the best sleep of your life” is subjective; no one can measure or verify it.1Legal Information Institute. Uniform Commercial Code 2-313 – Express Warranties by Affirmation, Promise, Description, Sample
The dividing line is whether the statement can be objectively tested. “This engine produces 400 horsepower” is verifiable. “This is a great engine” is not. A car dealer saying “you’ll love this car” is puffery. The same dealer saying “this car gets 35 miles per gallon on the highway” is a factual commitment. The more specific and measurable the claim, the more likely a court treats it as a warranty rather than sales enthusiasm.
How It Differs From an Implied Warranty
Express warranties exist because the seller said something specific. Implied warranties exist whether the seller said anything or not. The implied warranty of merchantability attaches automatically to every sale by a merchant and guarantees a baseline level of quality for the product’s ordinary use. A toaster must toast bread. The implied warranty of fitness for a particular purpose arises when a seller knows the buyer needs the product for a specific use and the buyer relies on the seller’s expertise.
Express warranties can go far beyond that baseline. Describing a jacket as “waterproof to 10,000mm” makes a promise that reaches well past the implied guarantee that the jacket functions as outerwear.
Do “As-Is” Clauses and Disclaimers Wipe It Out?
Sellers often try to disclaim warranties through contract language, “as-is” labels, or fine print. The UCC has a clear rule: when the seller’s words create an express warranty and other language tries to take it away, courts must try to read both as consistent. If that’s impossible, the disclaimer loses and the warranty stands.2Legal Information Institute. Uniform Commercial Code 2-316 – Exclusion or Modification of Warranties
A salesperson who tells a buyer the roof won’t leak for twenty years can’t bury a disclaimer on page nine of the contract and expect it to override that promise. The familiar “as-is” and “with all faults” language is designed to exclude implied warranties, not express ones. A specific factual promise survives.2Legal Information Institute. Uniform Commercial Code 2-316 – Exclusion or Modification of Warranties
What to Do When the Product Fails
A buyer who has accepted the goods must notify the seller of the problem within a reasonable time after discovering it, or after they should have discovered it. Skipping this step or waiting too long can bar any remedy entirely.3Legal Information Institute. Uniform Commercial Code 2-607 – Effect of Acceptance; Notice of Breach
What counts as “reasonable” depends on context. A consumer who spots a crack in a new appliance and calls the store a week later is probably fine. A business that finds defective raw materials and sits on the discovery for six months is likely in trouble. The safest move is to write the seller as soon as you identify the defect, describe it clearly, and keep a copy.
Damages You Can Recover
The UCC’s standard measure is the difference between what the goods were worth as delivered and what they would have been worth if they had matched the warranty. Pay for a machine rated at a certain output, receive one that produces significantly less, and your damages are the gap between those two values.4Legal Information Institute. Uniform Commercial Code 2-714 – Buyer’s Damages for Breach in Regard to Accepted Goods
Two other categories of loss are available:
- Incidental damages: costs incurred because of the breach, such as return shipping, inspection fees, or expenses finding a replacement.
- Consequential damages: broader losses the seller had reason to anticipate at the time of the contract, such as lost business profits caused by defective equipment, or personal injury caused by a product that didn’t perform as warranted.5Legal Information Institute. Uniform Commercial Code 2-715 – Buyer’s Incidental and Consequential Damages
Consequential damages can dwarf the purchase price. A $500 pump warranted to handle corrosive chemicals that fails and ruins $50,000 of inventory exposes the seller to the full downstream loss. Sellers sometimes limit consequential damages by contract, and courts generally allow those limits unless they are unconscionable or involve personal injury from consumer goods.
Extra Rules When the Warranty Is Written
When a seller or manufacturer puts a warranty in writing on a consumer product, the Magnuson-Moss Warranty Act adds federal requirements on top of state commercial law. The Act does not force any company to offer a written warranty. Once one exists, though, it has to follow specific rules.6Office of the Law Revision Counsel. 15 USC 2301 – Definitions
Full vs. Limited Label
Every written warranty on a consumer product must be labeled either “full” or “limited.” A full warranty carries federal minimum standards: the warrantor must fix defects within a reasonable time at no charge, cannot limit the duration of implied warranties, and must offer the consumer a choice between a refund or a free replacement if repairs fail after a reasonable number of attempts.7Office of the Law Revision Counsel. 15 USC 2304 – Federal Minimum Standards for Warranty Anything short of that must be labeled “limited.”
Disclosure Before You Buy
For consumer products costing more than $5, the written warranty must clearly identify who is covered, which parts are included, and what the warrantor will do if something goes wrong.8Office of the Law Revision Counsel. 15 USC 2302 – Rules Governing Contents of Warranties The terms must be available for consumers to read before purchase, which stops the old trick of hiding restrictive language inside sealed packaging.
Implied Warranties Can’t Be Disclaimed
Any supplier that offers a written warranty cannot disclaim implied warranties. The same rule applies to sellers who offer a service contract within 90 days of the sale. Any attempt to disclaim implied warranties in violation of this rule is void under both federal and state law.9Office of the Law Revision Counsel. 15 USC 2308 – Implied Warranty Restrictions
Attorney’s Fees for a Winning Consumer
A consumer who prevails in a Magnuson-Moss suit can recover attorney’s fees and court costs as part of the judgment. The court has discretion, but successful plaintiffs almost always receive them.10Office of the Law Revision Counsel. 15 USC 2310 – Remedies in Consumer Disputes Fee-shifting is what makes it economically viable to sue over a $600 appliance. Without it, legal costs would swamp the claim.
How Long You Have to Sue
Under the UCC, a lawsuit for breach of warranty must be filed within four years. The parties can agree in the contract to shorten that window to as little as one year, but they cannot extend it beyond four.11Legal Information Institute. Uniform Commercial Code 2-725 – Statute of Limitations in Contracts for Sale
When the clock starts depends on what kind of warranty it is. For most warranties, the four years begin at delivery, regardless of when you discover the problem. Buy a furnace in January, discover the defect in November, and your four years still started in January. The exception is a warranty that explicitly extends to future performance. A promise that the furnace will heat efficiently for ten years pushes the start of the clock to when the breach is discovered or should have been discovered.11Legal Information Institute. Uniform Commercial Code 2-725 – Statute of Limitations in Contracts for Sale
The difference matters. “Stainless steel construction” describes what the product is at the moment of sale, so the clock starts at delivery. “Will not rust for five years” reaches into the future, giving the buyer more time. Read the warranty carefully to see whether the promise is about a present fact or a future outcome.