BMW S55 Engine

The BMW S55 engine represents the next evolution of M Power performance — a 3.0-liter twin-turbocharged inline-six derived from the legendary N55 but re-engineered by BMW M for ultimate precision and durability. Producing 425 to 444 horsepower (depending on model and Competition Package) and 406 lb-ft of torque, the S55 delivers explosive acceleration with linear turbo response and razor-sharp throttle control. Built from a closed-deck aluminum block, it features forged crankshaft and pistons, water-to-air intercooling, and Valvetronic + Double VANOS variable valve timing, offering both everyday usability and track performance.

This used BMW S55 engine is ideal for OEM replacement or M-performance swaps, providing genuine factory power and reliability. Every unit is carefully inspected and compression-tested to ensure optimal health and compatibility. Explore other premium BMW powerplants like the BMW S65 Engine or BMW N55 Engine for more inline-six and V8 performance options.

2014–2015 BMW M3/M4 S55 Engine

The 2014–2015 BMW M3 (F80) and M4 (F82) debuted the all-new S55B30 engine, marking the return of turbocharging to BMW’s M lineup. Rated at 425 hp and 406 lb-ft, it used twin mono-scroll turbochargers for instant power delivery and impressive torque from low RPMs. M engineers optimized the lightweight crankshaft and integrated a high-capacity oil system for sustained high-G cornering. This early S55 variant delivers thrilling acceleration while maintaining everyday drivability and fuel efficiency.

2016–2018 BMW M3/M4 Competition Package Engine

From 2016, the Competition Package S55 received power and cooling upgrades, raising output to 444 horsepower. Enhanced exhaust tuning and recalibrated ECU mapping sharpened throttle response and mid-range delivery. Known for its track-ready endurance and sharper sound profile, this version was featured in the M3, M4, and M4 Convertible (F83). The S55 Competition variant delivers even greater precision, making it one of BMW’s most versatile turbo engines for both street and circuit use.

2019–2020 BMW M2 Competition S55 Engine

In 2019, BMW fitted the S55 engine into the M2 Competition (F87) — offering compact dimensions with supercar performance. Detuned slightly to 405 hp, it maintained the same forged internals, turbos, and cooling system as the M3/M4 variants. With a shorter wheelbase and lighter chassis, the S55-powered M2 became an instant enthusiast favorite for its agility, power delivery, and reliability. This engine variant remains highly sought after for swaps and performance conversions.

Performance and Reliability

The BMW S55 engine is renowned for its track durability and tuning potential, capable of safely producing over 550 horsepower with ECU calibration and bolt-on upgrades. Its robust closed-deck design prevents cylinder wall flex, while direct injection and efficient cooling make it ideal for high-performance builds. Whether in a factory M3, an M2 swap, or a restomod project, the used BMW S55 engine delivers premium OEM performance backed by proven engineering and reliability.

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