The BMW B38 is a turbocharged straight-three DOHC petrol engine, which replaced the straight-four BMW N13. Production started in 2013.
It is part of a modular BMW engine family, of straight-three (B38), straight-four (B48) and straight-six (B58) alloy block and head petrol engines, which use a displacement of per cylinder in the 1.2 and per cylinder in the 1.5. It specifically shares a lot of components with the BMW B37, due to their same size/configuration.
The B38 is used in front-wheel drive cars (such as the Mini Hatch and BMW 2 Series Active Tourer), as well as BMW's traditional rear-wheel drive and all-wheel drive (xDrive) configurations. The first car to use the B38 is the BMW i8 hybrid sports coupé, where it is used as a transverse mid-mounted engine.
The B38 features direct injection, an 11:1 compression ratio, variable valve timing (double-VANOS) and the single-scroll turbocharger with the world's first aluminium turbine housing, manufactured by Continental.
On the 1.2liter versions, the bore is and the stroke is . On the 1.5liter versions, the bore is and the stroke is .
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version (104kW (141bhp) for post-2018 manufacture)
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