I’m not using an ISOfix base. Do I still have to get it repaired?

Your seat is safe to use while you install it with the vehicle belt only.
But even if you are not having an ISOfix base with your BeSafe iZi Go X1, we kindly ask you to have your seat repaired anyhow, in case you might want to sell it or gift it to someone later on who might use it with an ISOfix base.