Electron transfer component of benzoate 1,2-dioxygenase system. H(+) + NAD(+) + 2 reduced [2Fe-2S]-[ferredoxin] = NADH + 2 oxidized [2Fe-2S]-[ferredoxin] Binds 1 [2Fe-2S] cluster per subunit. Xenobiotic degradation; toluene degradation. This dioxygenase system consists of three proteins: the two subunits of the hydroxylase component (BenA and BenB), and an electron transfer component (BenC). Belongs to the bacterial ring-hydroxylating dioxygenase ferredoxin reductase family. It is uncertain whether Met-1 or Met-11 is the initiator.