Some parts give no warning until they are already a problem. A timing belt is a common example on engines that use one. Its interval is printed in the owner's manual, not in a contract, and the job falls to you unless you decide otherwise.
Find the interval in the manual
Look up the timing belt or timing chain in the owner's manual and note the interval. Manuals often give a mileage figure and a time figure, and whichever comes first is the one to follow. Some engines use a chain instead of a belt, and the manual says which. Write the interval where you will see it, and set your reminder before the due point, not on it.
Decide who books it
Name the person who books the job, the shop that does it, and the person who keeps the paperwork. If the shop is one you trust, ask whether it will record the work in a form a contract might accept, and ask for an invoice that names the belt or chain. A vague invoice that says engine service is weak proof.
Questions to ask the contract
- Does the contract require scheduled maintenance to stay in force?
- What proof of maintenance does it ask for, and in what form?
- Can any licensed shop do the work, or only a dealer?
- What happens if the job is due and has not yet been done?
- How does the transfer clause handle maintenance records when the car changes hands?
Keep the calendar with the contract
Put the interval, the booking, the invoice, and the contract's proof requirements in the same folder. A claim is easier to handle when the maintenance trail is already complete, and much harder when you are rebuilding it after a problem. Read the maintenance and proof terms on the form itself, since they vary by company and this article does not describe any company's terms.