Consult Fuses

Friends, I have a Kia Sportage 2000, and checking the fuse box that goes inside the engine, I find that according to the fuses scheme of the user manual of this car, the fuse for the ABS system, it should be a 30A fuse, but currently this car has one of 20a, and the fuse of the gasoline pump says that it should have a fuse 15A, but currently it has one of 20a.

I make the change of these fuses, for the correct ones or I leave them as they are, what could it do ???

That is higher means that if there is a short circuit, it would take longer to cut this is theory, you can leave them so or change them, the ideal is that they correspond to the theory could produce problems but in practice and in real life it does not matter, do not worry that nothing happens.