A decade into production, BMW’s B58 turbocharged inline-six has done something few modern engines manage: it has only grown more impressive with age. What began as a replacement for the well-regarded N55 has evolved into one of the most versatile powerplants in the automotive world — turning up in everything from compact sports coupes to hardcore off-roaders, and even in a Toyota sports car that carries one of the most storied nameplates in enthusiast history. The B58’s staying power isn’t just a matter of longevity; it’s a testament to how well the engine was engineered from the start.
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