PS4 warranty SONY?

I wanted to ask something about PS4 owners.

My friend's ps4 is broken and he had his brother send it in, got it back and the brother says he bought a 2 year guarantee for 50 euro. Although I do not believe or know that you can buy a guarantee from Sony and Saturn etc. In any way, just my friend does not want to believe me…

Give me information whether I'm right or my friend or my friend's brother is right.

You can buy a warranty extension

You can now take out an extra guarantee for almost all devices. However, as far as I know, Sony does not offer it directly, which means you have to contact the dealer where the Playstation was bought and not directly from Sony.