BMW M4 Complete Engine – OEM Code S55B30A – Compatible with BMW M4

Firstly, this BMW M4 complete engine brings a genuine, low-mileage powertrain replacement to M4 owners needing a full engine swap. Additionally, this listing includes an authentic S55B30A 3.0-liter twin-turbo inline-six engine carrying original engine code S55B30A and 62,257 km of recorded use. Furthermore, buyers secure a genuine low-mileage engine in one purchase instead of risking a rebuilt unit with unknown internal wear. Moreover, this engine suits independent BMW M specialists, restoration shops, and M4 owners replacing a damaged or failed engine without sourcing a full donor vehicle.

BMW M4 Complete Engine Components Included in This Listing

• Complete S55B30A twin-turbo inline-six engine block and internals
• Both factory turbochargers with intact intake piping connections
• Original intake manifold and throttle body assembly 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 Buyers Choose This Genuine BMW M4 Engine

Because this is an authentic OEM unit pulled from an original M4 rather than a rebuilt or remanufactured replacement, internal tolerances, twin-turbo matching, and factory calibration match BMW M’s original specification exactly. Meanwhile, rebuilt S55 engines from unknown sources often carry hidden wear on turbo bearings or internal components that surface after installation. As a result, this genuine engine reduces the risk of premature failure compared to units with unverified rebuild history. Similarly, the confirmed 62,257 km reading gives buyers a clear picture of remaining service life before purchase.

Engine Characteristics and Practical Uses

• Genuine BMW M factory inline-six engine, not a rebuilt or generic unit
• Confirmed mileage of 62,257 km from original donor vehicle
• Twin-turbo configuration delivers factory-rated M4 performance output
• Matches engine code S55B30A for direct compatibility without recalibration risk
• Ideal for collision repair, engine failure, or full powertrain restoration
• Sold as a complete assembly, avoiding mismatched component sourcing

Vehicle Fitment and Model Compatibility

• Fits BMW M4 models equipped with the factory S55B30A twin-turbo 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 M4 coupe and convertible variants sharing the same engine
• Wiring harness connectors align directly with factory engine control unit

Installation Notes and Engine Condition Details

• Installation should only be performed by technicians experienced with BMW M powertrains
• Turbo plumbing and wiring integration require precise factory reconnection
• Engine block, turbochargers, and connectors inspected before listing
• No fluid leaks or component damage confirmed during inspection
• Engine control module should be verified or recalibrated after installation
• Torque specifications must be followed per factory service guidelines

Shipping Standards and Purchase Assurance

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 turbochargers and wiring. Typically, buyers receive tracking confirmation promptly once the order ships. Ultimately, this engine is verified against genuine BMW M4 specifications, giving buyers confidence in mileage and authenticity before installation begins.