Hi Nikmcc,
It's unlikely that you will have any issues given the kite seems to only be about 4 years old, unless the kite has been stored in excessive heat for a long time.
It's been at least 10 years that all kite manufacturers stopped gluing valves to bladders and started thermo welding them instead.
This means you don't have to worry about valves peeling off anymore.
There is still a chance that valves crack, break and that strut tubes start to do the same. A quick visual check will determine this.
The first signs are usually from the strut tubes becoming brittle and rough on the surface and the valves starting to turn to a brown/yellowish color.
Here is an example of this:

This is usually an issue if/when the kite is regularly exposed to excessive heat.
If the kite was stored dry, inside, in a controlled environment, and your valves + strut tubes look healthy, you have nothing to worry about.
Hope this helps.
Christian - KiteBud