A squeal that shows up on a cold morning or in the rain is easy to dismiss. It often is not nothing. The drive belt, sometimes called the serpentine belt, turns the alternator, the power steering pump, the air conditioning compressor, and on many engines the water pump. When it slips, glazes, or cracks, the car can lose several of those jobs at once, and the first sign is usually a noise you have learned to ignore.
What the sound is telling you
A short, high chirp at startup, or a squeal that fades once the engine warms, usually points to a belt that has lost grip. Age, oil on the ribs, or a tensioner that no longer holds the belt tight are the common causes. A steady squeal when you turn the wheel at a standstill can point to a worn pulley or a power steering component working harder than it should. A rhythmic slapping sound, or a belt that jumps off its pulleys, is a stop-now sign, not a wait-and-see one.
Look before you listen. With the engine off and cool, check the ribbed face of the belt for cracks, missing ribs, shiny or glazed patches, and fraying along the edges. See whether the belt sits square in its pulleys and whether the tensioner arm moves freely. Keep your hands clear of the belt and pulleys while the engine runs. If you are not sure what you are looking at, that is a job for a shop, not a quick look in the driveway.
Why it matters for the contract
A service contract does not stop a belt from wearing out. What it decides is who pays when the belt fails, and whether the failure counts as normal wear or as a covered breakdown. Many contracts list belts and similar parts as wear items, or leave them off the covered list altogether. Some treat a belt as covered only if it is named as a component. You will not learn that from a brochure, so read the covered parts list and the exclusions side by side, and search both for the word belt.
Ask whether the contract helps with towing or roadside trouble if the belt fails on the road, and whether that help is a separate part of the agreement. A broken belt can take out power steering, the charging system, and the cooling fan drive in a short time, so the roadside terms matter as much as the repair terms.
Questions to put to the seller
Ask for the exact wording on drive belts, tensioners, and pulleys, not a summary of it. Ask whether belt replacement counts as routine maintenance that you pay for, and whether the contract requires you to keep records of it. Ask whether repairs must be done at an approved shop, and what happens if the belt goes while you are far from home. Ask how a claim is paid, who orders the parts, and how long any waiting period runs before a new component is covered. If a belt fails during a waiting period, the cost usually falls to you.
Your own check
Note the squeal, when it happens, and whether it changes when you turn the wheel, switch on the air conditioning, or run the lights and wipers. Write down the mileage on the dash at the same time. Keep the belt replacement on the same record as your oil changes so the paper trail matches. If you cannot tell whether a belt is worn, an inspection you arrange and pay for before you buy the contract is worth more than an argument over a claim afterward.
For the terms each company prints, see the term-by-term comparison. For how we gather and weigh those figures, see how we score vehicle service contract companies.