Open the relevant compartment
Ask the seller to show you the spare-wheel or repair-kit storage area. A space under the boot floor does not establish that all the intended equipment is still there. Record what you can actually see without removing heavy or unfamiliar components.
Identify the items
If there is a spare wheel, ask which tools belong with it and check the vehicle's instructions. If there is a repair kit, inspect its visible labels, instructions and any expiry date. Do not assume that the kit is complete or suitable for every type of tyre damage.
Do not practise roadside work casually
A viewing is not the place to improvise jacking or tyre repair. Never go beneath a vehicle supported only by a jack, and do not test sealant by discharging it. Ask a qualified professional to resolve questions about condition, compatibility or missing equipment.
Write a handover list
Include the equipment that has been agreed as part of the sale, such as the wheel, kit, tools and any wheel-lock key where applicable. Keep this list separate from a factory equipment description, which does not establish what remains in the boot today. Before driving away, make sure you know where the relevant instructions are and whom to contact if a tyre problem occurs.