BMW S55B30A Engine – Genuine M3/M4/M2 Twin-Turbo Unit – Compatible with M3/M4/M2 – 2018 (Catalytic Converter Not Included)

BMW S55B30A engine brings a genuine, low-mileage powertrain replacement to M3, M4, and M2 owners needing a full engine swap. Additionally, this listing includes an authentic 3.0-liter twin-turbo inline-six engine manufactured in 2018, carrying original engine code S55B30A and 18,743 km of recorded use, delivered exactly as pictured BMW S55B30A engine complete with all attachments except the catalytic converter. Furthermore, buyers secure a genuine low-mileage S55B30A engine in one purchase instead of risking a rebuilt unit with unknown internal wear. BMW S55B30A engine Moreover, this engine suits independent BMW M specialists, restoration shops, and M3/M4/M2 owners replacing a BMW S55B30A engine damaged or failed engine without sourcing a BMW S55B30A engine full donor vehicle.

Flywheel, Exhaust Manifold, and Wiring Harness Included

• Complete S55B30A twin-turbo inline-six engine block and internals
• Original flywheel and clutch mounting surface intact
• Original exhaust manifold and downpipe routing intact
• Factory wiring harness and engine control connector points
• Original oil cooling lines and coolant hose routing intact
• BMW factory identification tag confirming engine code S55B30A

Why This S55 Unit Beats an Unverified Rebuild

• Authentic OEM unit pulled from an original M3/M4/M2 donor vehicle
• Internal tolerances and twin-turbo matching confirmed before listing
• Factory calibration matches BMW M’s original specification exactly
• Rebuilt S55 engines from unknown sources often carry hidden wear
• This genuine engine reduces the risk of premature failure
• Confirmed 18,743 km reading gives buyers a clear picture of remaining service life

S55B30A Engine Output and Suitable Applications

• Genuine BMW M factory inline-six engine, not a rebuilt or generic unit
• Confirmed mileage of 18,743 km from original donor vehicle
• Twin-turbo configuration delivers factory-rated M3/M4/M2 performance output
• Matches engine code S55B30A for direct compatibility without recalibration risk
• Ideal for collision repair, engine failure, or full powertrain restoration
• Supplied without catalytic converter — buyers must source separately

Compatible M3, M4, and M2 Models and Fitment Requirements

• Fits BMW M3, M4, and M2 models equipped with the factory S55B30A engine
• Matches original engine code S55B30A for guaranteed compatibility
• Requires confirmation of engine code match before ordering
• Compatible with factory mounting points without chassis modification
• Suited for M3 sedan, M4 coupe/convertible, and M2 variants sharing the same engine
• Buyers must source a compatible catalytic converter separately for installation

Installing the S55 Twin-Turbo Engine Correctly

• Installation should only be performed by technicians experienced with BMW M twin-turbo powertrains
• Exhaust manifold and turbo plumbing require precise factory reconnection
• Engine block, flywheel, and connectors inspected before listing
• No fluid leaks or component damage confirmed during inspection
• Buyers should source and fit a catalytic converter before completing installation
• Engine control module should be verified or recalibrated after installation

Delivery and Assurance for This S55B30A Engine

Given the weight and value of a complete twin-turbo engine, this unit ships on a secured pallet with reinforced crating and protective packaging around the exhaust and wiring. Typically, buyers receive tracking confirmation promptly once the order ships. Ultimately, this engine is verified against genuine BMW M specifications, giving buyers confidence in mileage and authenticity before installation begins.