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.
Design 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 .
Models Engine Displacement Power Torque YearsB38A12U0 at 4,000 rpm at 1,400–4,000 rpm 2014– at 4,250 rpm at 1,400–4,000 rpm 2014– B38A15M0 / B38B15M0 – at 4,400–6,000 rpm – at 1,250–4,300 rpm 2014–2018 B38K15T0 at 5,800 rpm at 3,700 rpm 2013–B38A15M1 / B38B15M1 (improvement of B38A15M0) at 4,400–6,000 rpmat 1,250–4,300 rpm2018–
B38A12U0 Applications:
version: 2014–2024 F55/F56 Mini One First
version: 2014–2018 F55/F56 Mini One
B38A15M0 / B38B15M0 (B38A15M1/B38B15M1 for post-2018 manufactured engines) Applications:
version: 2015–2021 BMW F45/F46 216i Active Tourer / Gran Tourer 2018–2024 F55/F56 Mini One
version: 2015–2019 BMW F20/F21 116i
version (104kW (141bhp) for post-2018 manufacture) 2015–2019 BMW F20/F21 118i 2015–2021 BMW F22/F23 218i coupe / convertible 2014–2021 BMW F45/F46 218i Active Tourer / Gran Tourer 2015–2019 BMW F30/F31 318i LCI 2015–2021 BMW F48 X1 sDrive18i 2014–present Mini F55/F56/F57 Cooper 2015–2019 Mini F54 Clubman 2017–present Mini F60 Countryman 2017–2023 BMW F39 X2 sDrive18i 2017–2021 BMW F45 225xe Active Tourer (PHEV) 2019–present BMW F40 118i 2019–present BMW F44 218i Gran Coupé 2020–2023 BMW F39 xDrive25e version:
B38A15M2 Applications:
2022–present BMW U11/12 X1 2021–present BMW U06 2023–present BMW U10 X2
B38K15T0 Applications: 2013–2020 BMW I12 i8 2020–present Karma Revero GT/GTS
References