It follows the N54 and N55 turbocharged inline-six engines in a lineage of legendary BMW straight-sixes, but unlike those, it's seen an ever-broader range of use in an ever-growing lineup of BMW ...

That's a lot to ask of any engine, despite the B58 sharing a lot with the N55, its predecessor. There are also correlations between the BMW B58 and the Toyota 2JZ. Iconic is an overused term ...