Most service contracts open with a page of defined terms, and most buyers skip it. That is a mistake. A word such as wear, component, breakdown, or pre-existing condition is often given a specific meaning, and the rest of the contract is read through that meaning.
Start with the words that set the edges
Find the terms that describe what triggers coverage. Look at how the contract defines a mechanical breakdown: whether it means the part stopped working, or that the part failed to perform its normal function. Check how wear and tear is handled, because a contract may exclude normal wear while still addressing a part that fails suddenly. Find the definition of a covered component and see whether the list is closed or only offers examples. An example list leaves room for argument, while a closed list leaves less.
Check what you already have
Compare the defined terms with the paperwork you already hold. A factory warranty, a separate maintenance plan, or a roadside program may use different words for the same event. If the definitions do not match, a claim can be turned down under one document and accepted under another, or refused under both. Ask the provider to explain in writing which document applies first when two of them overlap.
What to ask the seller
Ask for a full copy of the contract before you sign, including the definitions page and any amendment. Ask who decides whether a failure fits a defined term: the provider, the administrator, or the shop. Ask whether the definition of a covered failure changes with the age or mileage of the car. If the seller cannot answer in writing, treat the answer as unknown and read the contract again. To see which providers publish their paperwork in advance, use the list of providers that post a sample contract, and read the methodology page to see how we check the terms we print.