The Magnuson-Moss Warranty Act in Plain English

The Magnuson-Moss Warranty Act is a federal law that governs written warranties on consumer products. It was passed in the 1970s to make warranties easier to understand and harder to abuse. You do not need to read the law itself to benefit from it, but knowing the basics helps when you buy a car, an appliance or anything with a written warranty.

What the law does in general

At a high level, the law:

• Sets disclosure rules so warranty terms are written clearly.
• Requires warranties to be labeled as "full" or "limited."
• Limits a company's ability to disclaim certain implied warranties when it offers a written warranty or service contract at the time of sale.
• Restricts "tie-in" conditions that require you to use a specific brand of parts or service to keep warranty coverage, with some exceptions.
• Gives consumers a way to take legal action when a warrantor does not honor its warranty.

The Federal Trade Commission is the main agency that enforces and explains the law.

Full vs. limited warranties

Under the law, a written warranty on a consumer product must be designated as either full or limited.

A full warranty must meet certain federal minimum standards, such as providing a remedy within a reasonable time without charge and not limiting how long implied warranties last.

A limited warranty does not meet all those standards. Most vehicle warranties are limited warranties. That is not a bad thing on its own. It just means the specific terms in the document define your coverage.

The "tie-in" rule and your maintenance

One of the most useful parts of the law for car owners concerns maintenance. In general, a manufacturer cannot void your warranty or deny coverage simply because you used aftermarket parts or had maintenance done at an independent shop, unless the parts or service are provided free under the warranty or the manufacturer gets a specific waiver.

What this means in practice:

1. You can usually have oil changes and routine maintenance done at an independent shop or do them yourself.
2. Keep receipts showing the work was done on schedule with appropriate parts and fluids.
3. A manufacturer can still deny a claim if it shows that an aftermarket part or improper service caused the failure.

How it relates to service contracts

The law distinguishes between a warranty, which is part of the product's purchase, and a service contract, which you buy separately for an additional price. Extended car warranties sold by third parties are generally service contracts.

Service contracts are also regulated by state laws, which vary. Your contract's terms, plus your state's rules, determine your rights. Check your state's consumer protection or insurance department for local rules. Our state guide offers a starting point.

What it means for lemon cases

State lemon laws handle many new-car defect disputes. The Magnuson-Moss Act can also apply when a warrantor fails to honor a written warranty, and in some cases it allows consumers to recover attorney fees. If you think you have a claim, a consumer attorney can explain your options.

Practical takeaways

• Read the warranty before buying. The law requires warranty terms to be available for review before purchase for many products.
• Keep maintenance records, whoever does the work.
• Ask for denials in writing, with the specific reason.
• Know who the warrantor is, whether a manufacturer or service contract provider.
• Check your state's rules for service contracts and lemon laws.

Our FAQ answers common questions about coverage and maintenance, and the auto warranty overview explains how factory warranties and service contracts differ.

Common myths

A few misunderstandings come up often:

• "Only the dealer can do my oil changes." In general, you can use any qualified shop or do it yourself, as long as you keep records.
• "Any aftermarket part voids my warranty." Generally not. Coverage can be denied for damage the part caused, not simply because it was installed.
• "A limited warranty is worthless." Most car warranties are limited, and they can still provide substantial coverage.

How Warranty Wizards can help

We help you compare service contracts from third-party providers and explain the terms of each plan before you buy. Request a free quote at /get-a-quote/.