Most people learn what a service contract covers the moment a part fails and the shop calls. That is the wrong moment. A short list of wear items often decides who pays for tires and brakes, and it usually sits in the exclusions, not in the coverage summary on the front page.
Why wear items get their own line
A wear item is a part expected to wear down through normal use: tires, brake pads and shoes, rotors, wiper blades, clutch linings, and similar parts. A service contract is generally built to pay for mechanical and electrical failures, the parts that break without much warning. Parts that are replaced on a schedule are treated differently. Contracts commonly name them in a list of excluded items, or in a section that says the provider does not pay for normal wear. Read which approach yours uses. Either way, the bill for a worn part can land with you.
Find the line before you need it
Start with the exclusions section, not the front page. Search for the words wear, normal wear, wear and tear, wear items, consumables, and maintenance items. Then judge whether the list is specific or general. A list that names tires, brakes, and fluids is clear. A line that excludes anything subject to normal wear leaves the question open, so ask the provider to show you how that line applies to a brake job.
Also watch for the difference between a part that wore out and a part that failed early. A caliper that seizes may fall under mechanical coverage, while the pads it wore down may not. Ask how a claim is split when one repair involves both. If the answer is a phone call and no written rule, get the rule in writing before you sign.
Ask these questions before you sign
Put these questions to the seller and, where you can reach them, to the provider directly. Write down each answer and the name of the person who gave it. Which parts does the contract list as wear items, and is that list in the contract itself or only on a sales sheet? Does a tire that is damaged, as opposed to worn, fall under coverage? Does a brake component count as mechanical when the pads are excluded? What must appear on the work order for the provider to tell the two apart? Who decides the split when the shop and the provider disagree?
Check the paperwork against the car
Open the owner's manual and read the maintenance schedule. Many parts a manual lists for replacement at set intervals are the same parts a contract excludes as wear, so the overlap is worth knowing before a repair. Keep the shop invoices, because a provider reviewing a claim may ask whether the car was serviced as the contract requires. The contract should say which records it wants, and that rule belongs in the same file as the contract. The providers that publish a sample contract page lists companies whose full terms you can read before you commit, and the comparison table lays published terms side by side so you can check the wear language yourself.