Classic Spare parts
Spare parts can be many different items and belong to many different things. You can talk about spare parts for all motorized vehicles, such as cars, tractors, motorcycles, etc., but you can also talk about electronic, like computer and camera, as well as various other machines.
Some spare parts can be very rare. It may be that you have a car from the 60’s and something about this has to be replaced, but as you want the original parts, it may be difficult. Fortunately, some people do not deal with anything other than looking for special spare parts, and they can even replace them.