Belts and hoses are inspection items on most schedules. The schedule sets a point at which they are examined, and replacement follows either from the condition found or from a separate interval for specific parts.
This belt drives components such as the alternator and the air conditioning compressor. It is normally examined for cracking, glazing and fraying, along with the tensioner and pulleys that keep it loaded. A belt that fails takes those accessories with it, which is why it appears on inspection lists well before the end of its life.
These are not the same item. An engine designed with a timing belt carries a scheduled replacement for it, and the interval is specific to that engine. An engine designed with a chain generally has no listed replacement point. Which one an engine uses is a property of the engine, so the schedule record for your configuration is what settles it.
Hoses are checked for swelling, softness, hardening and seepage at the clamps. Heat cycling ages rubber whether or not the vehicle is driven far, which is why hose inspection often carries a time trigger alongside a distance figure. See mileage vs. time for how those pair up.
Which items are listed, and whether a timing belt replacement applies, comes from the manufacturer record for your engine.
Find my vehicleAnswers that apply generally. Timing for a specific car comes from its own schedule.
