Spare parts are components that are used to replace or repair worn-out or damaged parts of equipment or machinery.

Spare parts are parts that you can buy separately to replace old or broken parts in a piece of equipment. They are usually parts that are designed to be easily removed or fitted. In the future the machines will need spare parts and maintenance.

Spare parts is a generic term for all parts that can be used as replacements. A wing, door mirror, wish-bone, indicator, bumper, etc, etc. These are not essential service parts to keep the vehicle running smoothly but need to be used when the current part is no longer in good working order.