Deciphering the Bmw 'Is' Emblem: Visual Badging Breakdown and Factory Specs

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Two decades later, BMW revived the nomenclature for what would become the definitive farewell to the E92 coupe platform: the 2011, 2013 BMW 335is. While base 335i models shifted to the single-twin-scroll N55 engine for cost efficiency and emissions compliance, Munich chose to retain and hot-rod the fabled N54 twin-turbo engine exclusively for the 335is.

Engineers extracted 320 horsepower and 332 lb-ft of torque from the 3.0-liter twin-turbo direct-injection inline-six. A software-controlled overboost function temporarily allowed manifold pressure to surge, unleashing 370 lb-ft of torque for up to seven seconds under wide-open throttle. To handle the thermal loads that plagued track-driven base models, the factory integrated heavy-duty hardware: an auxiliary radiator mounted inside the driver-side wheel well, an external oil cooler in the passenger-side wheel well, and a high-draw 850-watt electric cooling fan. Furthermore, BMW offered the lightning-quick 7-speed dual-clutch transmission (DCT) directly derived from the E92 M3, pairing it with stiffer engine mounts and a throaty factory sport exhaust system devoid of restrictive center resonators.