MK4 battery mounted fuse box with upgraded 150A main alternator fuse and wire crimped soldered to increase current carrying and reliability for the fuse box to battery wire. If you have a faulty alternator wire that caused a box to melt, that also needs replaced (we have replacements listed in the shop in stock 4AWG size and upgraded 2AWG). If cabin relay panel wire (largest red wire) is also bad and corroded we can make replacements for that as well. Only replacing the fuse box but not faulty wires can lead to melted a fuse box again.