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Powerful, light and fuel-efficient three cylinder drive units that form part of a new generation of engines. Cutting-edge engine technology ensures hallmark brand driving fun, combined with exemplary efficiency.

Thanks to BMW TwinPower Turbo Technology, the new generation of three-cylinder engines can achieve agile performance and excellent responsiveness even at low rpms, while at the same time featuring exceptionally low fuel consumption and emissions. The engines in this new generation combine the newest fuel-injection technologies and completely variable power distribution with innovative turbocharger technology to achieve improved efficiency and dynamics.

The further improved diesel engines from the BMW Group are the latest milestone in an evolutionary development process.By increasing the aluminium content and using the even lighter material magnesium, the BMW Group has also achieved substantial reductions in the average weight of the new engines. At the same time thermal management and acoustic properties have also been improved.


B37C15K0 B37C15U0
Engine type 3-cyl. Inline (E-W) 3-cyl. Inline (E-W)
Displacement [ccm] 1.496 1.496
Power [kW] @ [1/min] 70 @ 4.000  85 @ 4.000 
Torque [Nm] @ [1/min] 220 @1.750 - 2.250 270 @1.750
Emission standard EU6 EU6
CO2 range [g/km]* 89-92 95 - 99

 * depending on vehicle

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    Variable Twin Turbo technology takes the BMW four-cylinder diesel engines to unmatched levels of performance. It dual-stage design enables the engines to achieve performance figures that previously only larger engines could reach. Emissions and fuel consumption, however, are impressively low. The 4 cylinder engine featured rear-mounted chain drive system designed to satisfy even future pedestrian impact severity reduction requirements. The auxiliary units are positioned on the left-hand side of the engine. By having the auxiliary units all on one side, space is created on the right-hand side of the engine for locating exhaust treatment components close to the engine. There is also sufficient space for the Top model turbocharger assembly. The introduction of BMW's dual-stage turbocharging system, Variable Twin Turbo, represents another quantum leap in diesel engineering. This technology delivers a performance boost of 25 per cent, and enables instant responsiveness even at low engine speeds - as well as enormous reserves of power at higher revs. The heart of the Variable Twin Turbo system comprises two turbochargers of different sizes. In contrast to the bi-turbo system, the two turbochargers do not operate parallel, but are activated at different points. Precisely coordinated, they run individually or together, increasing the pressure of the intake air to the optimum level. The greater pressure of the intake air enables a more effective combustion of the diesel fuel in the cylinder. At lower engine speeds, the intake air passes through the inactive larger turbocharger into the active smaller turbocharger, which increases the air pressure. At medium engine speeds, the larger turbocharger becomes active, forcing air under pressure into the smaller unit, which increases the pressure still further. At higher engines speeds, the larger turbocharger alone forces air into the cylinders. Despite these impressive dynamics, the fuel consumption of the Variable Twin Turbo diesel engine is exemplary low. It has also been possible to minimize the height of the cylinder head. The inlet ports now run parallel and the intake system with integral swirl flaps is an ultra-compact design. The 3rd-generation common-rail system with an injection pressure of up to 1,800 bar, a new high-pressure pump and piezo-electric fuel injectors complete the fuel-system. So fuel injection is even more precise and finely measured. Thus reducing consumption as well as exhaust emission levels, while boosting engine power.

other diesel engines.

4-cylinder diesel.

6-cylinder diesel.