Catalyzes both the oxidation of benzene and toluene. benzene + H(+) + NADH + O2 = cis-1,2-dihydrobenzene-1,2-diol + NAD(+) H(+) + NADH + O2 + toluene = (1S,2R)-3-methylcyclohexa-3,5-diene-1,2-diol + NAD(+) Binds 1 [2Fe-2S] cluster per subunit. Binds 1 Fe cation per subunit. Aromatic compound metabolism; benzene degradation; catechol from benzene: step 1/2. Xenobiotic degradation; toluene degradation. Xenobiotic degradation; xylene degradation. This dioxygenase system consists of four proteins: the two subunits of the hydroxylase component (BnzA and BnzB), a ferredoxin (BnzC) and a ferredoxin reductase (BnzD). Belongs to the bacterial ring-hydroxylating dioxygenase alpha subunit family.